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Walker Physics 2nd Sem Exam Study Guide

Total questions: 200

Worksheet time: 5hrs 1mins

Name
Class
Date
1.
The velocity is always _____ to the line of a circle. 
a)
outwards
b)
towards the center
c)
tangent
d)
faster
2.

Which of the following depict the velocity of the ball?

a)

A

b)

B

c)

C

d)

D

3.
What is the direction of the velocity at point B, if the ball is revolving clockwise?
a)
up
b)
right
c)
down
d)
left
4.
Which represents the acceleration of the ball?
a)
A
b)
B
c)
C
d)
D
5.
What is the direction of the acceleration at point A, if the ball is revolving clockwise?
a)
up
b)
right
c)
down
d)
left
6.
Which statement is true about an object that is traveling in uniform circular motion?
a)
The speed of the object varies.
b)
The net force on the object is directed toward the center of the circular path.
c)
The direction of the object's velocity is constant.
d)
The net force on the object is directed away from the center of the circular path.
7.

A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?

a)
b)
c)
d)
8.
What is the force that causes centripetal acceleration when a car goes around a curve?
a)
Friction
b)
Gravity 
c)
Normal
d)
Tension
9.
Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.
a)
10 N
b)
20 N
c)
30 N
d)
40  N
10.
Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s2.
a)
2.4 m/s
b)
3.6 m/s
c)
3.9 m/s
d)
4.2 m/s
11.
Calculate the mass of an object if it took 20 N to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s
a)
4.1 kg
b)
3.6 kg
c)
2.5 kg
d)
1.8 kg
12.

What's the centripetal acceleration of a 0.2 kg yoyo spun in a circle with a radius of 0.7 meters at a velocity of 3 m/s?

a)

8.23 m/s2

b)

10.54 m/s2

c)

12.86 m/s2

d)

17.39 m/s2

13.

Bruno the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his acceleration?

a)

0.25 m/s2

b)

1.3 m/s2

c)

1.6 m/s2

d)

0.74 m/s2

14.
A 0.50-kg mass is attached to the end of a 1.0-m string.  The system is whirled in a horizontal circular path.  If the maximum tension that the string can withstand is 350 N.  What is the maximum speed of the mass if the string is not to break?    
A) 700 m/s  
B) 26 m/s  
C) 19 m/s  
D) 13 m/s  
a)
A
b)
B
c)
C
d)
D
15.
Which of the following is Newton's Law on Gravitation?
a)
F=Gm1m2/r
b)
F = Gm1m2/r2
c)
F = Gm1m2/2r
d)
F = m1m2/2r
16.
The moon and other satellites rotate around the earth. Identify the force that keeps these satellites in orbit.
a)
gravity
b)
friction
c)
a strong force
d)
electromagnetic force
17.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass
18.
If I double the distance between two objects, what happens to their gravitational Force?
a)
4x bigger
b)
4x smaller
c)
2x bigger
d)
2x smaller
19.
Complete the following statement: The farther away two planets are the _______ the gravitational force between them.
a)
more
b)
same
c)
dosen't matter
d)
less
20.

Calculate the force of gravity (F) between two objects whose masses are m1 = 100 kg and m2 = 1000 kg if they are separared by a distance of d = 500 m.

a)

2.67 * 10-11 N

b)

0.4 N

c)

6.67 * 10-11 N

d)

1.3 * 10-8 N

21.

Find the distance between two objects whose masses are m1 = 4,500 kg, and m2 = 8,700 kg; if the gravitational force between them is F = 2.0 x 10-8 N.

a)

130565.25 m

b)

361.34 m

c)

0.19575 m

d)

0.783 m

22.

If the mass of either m1 or m2 is increased then the force of gravitation between them will...

a)

increase

b)

decrease

c)

stay the same

23.

Which pair of masses will have the greatest gravitational force of attraction between them?

a)

top pair because they have the greatest masses and are closer together

b)

middle pair, because they are closer together

c)

bottom pair because they have the greatest masses and are further apart

d)

all have the same Fg

24.

A car traveling at a constant 45 mph going around a curve is accelerating because

a)

it is getting faster

b)

it is getting slower

c)

it is changing directions

d)

it is not accelerating if it has a constant speed

25.

The car is travelling at a constant speed. If the car hits a patch of ice, what direction will it skid? Notice it is traveling counterclockwise.

a)

to the right >

b)

to the left <

c)

upwards ^

d)

downwards v

26.

According to Newton's 2nd Law, if we double the force on a mass, the acceleration on the mass will

a)

also double (multiplied by 2)

b)

quadruple (multiplied by 4)

c)

become half (multiplied by 1/2)

d)

be reduced by 1/4 (multiplied by 1/4)

27.

What type of force acts like the centripetal force when the moon orbits the Earth?

a)

FN

b)

Ff

c)

FT

d)

Fg

28.

What type of force acts like the centripetal force when a ball swings in a circle on a string?

a)

FN

b)

Ff

c)

FT

d)

Fg

29.
Who created the Universal Law of Gravitation?
a)
Copernicus
b)
Newton
c)
Kepler
d)
Galileo
30.

A race car completes three laps of a circular track with a radius of 35 m in 9.0 seconds. Determine the speed of the car.

a)

3.9 m/s

b)

73.3 m/s

c)

24.4 m/s

d)

1.0 m/s

31.

A yo-yo is whirled on a string, then the string breaks. What causes the yo-yo to move off in a straight line?

a)

friction force

b)

centripetal force

c)

inertia

d)

centripetal acceleration

32.

In which of the following scenarios is work being done, according to the physics definition?

a)

Solving an equation

b)

lifting up a book

c)

holding a barbell above your head

d)

keeping a bike from falling as it rolls along a sidewalk

33.

An object lifted 10m gains 200 J of potential energy. If the same object is lifted 20m, its potential energy gain is...

a)

Half as much

b)

The same

c)

Twice as much

d)

Four times as much

e)

More than 4 times as much

34.

It takes 60 J of work to push a large box 6 m across a floor. Assuming the push is in the same direction as the displacement, what is the magnitude of the force on the box?

a)

6 N

b)

10 N

c)

60 N

d)

360 N

e)

None of these

35.

If you do work on an object in one third of the usual time, your power output is...

a)

One third of the usual power output

b)

The same as the usual power output

c)

Three times the usual power output

d)

Impossible to predict

36.

A 5 kg mass has 100 J of potential energy with respect to the ground. Approximately how high above the ground is the mass?

a)

1 m

b)

2 m

c)

3 m

d)

4 m

e)

None of these

37.

A bow is drawn so that it has 40 J of potential energy. When released, the arrow will theoretically have a kinetic energy that is

a)

less than 40 J

b)

More than 40 J

c)

40 J

d)

Impossible to predict

38.

If you do 200 J of work in 10 seconds, your power output is...

a)

2000 W

b)

200 W

c)

20 W

d)

2 W

39.

Mrs. McRoberts carries a 50 N cat 10 m across a room. Her arms exert an upward force on the cat equal to its weight. How much work is Mrs. McRoberts doing on the cat?

a)

500 N

b)

50 N

c)

5 N

d)

0 N

e)

None of the above

40.

When a car breaks to a stop, all its kinetic energy is converted to...

a)

Stopping Energy

b)

Potential Energy

c)

Chemical Energy

d)

Heat through friction

e)

Nuclear Energy

41.

A ball rolling down an incline plane has its maximum potential energy at...

a)

The top

b)

A quarter of the way down

c)

Half way down

d)

The bottom

e)

Impossible to predict

42.

A shopping cart has a mass of 40 kg is pushed 10 m with a force of 20 N. How much work is done on the cart?

a)

200 J

b)

400 J

c)

800 J

d)

8000 J

43.

A block of ice sliding down an incline has its maximum kinetic energy at...

a)

the top

b)

the bottom

c)

halfway down

d)

impossible to predict

44.

If you push an object a given distance, while applying four times the force, you do...

a)

Twice as much work

b)

Four times as much work

c)

Half as much work

d)

The same amount of work

45.

A 10 kg ball has a height of 2 m, while a 5 kg ball has a height of 5 m. Which ball has more potential energy?

a)

The 5 kg ball

b)

The 10 kg ball

c)

They both have the same potential energy

d)

impossible to predict

46.

Which quantity has the greatest influence on the amount of kinetic energy a large truck has while moving down the highway?

a)

It's mass

b)

It's weight

c)

It's velocity

d)

It's size

e)

None of the above

47.

How much power is required to raise a 30 kg crate a vertical distance of 6 m in a time of 4 seconds?

a)

120 W

b)

52.5 W

c)

450 W

d)

385 W

e)

525 W

48.

In which case is the net work positive?

a)

work done by the tension of a string as a ball attached to it whirls in a horizontal circle

b)

work done to raise and lower a set of 25-kg barbells to and from the floor 10 times.

c)

work done to hole a set of 25-kg barbells at a constant height for 3 minutes

d)

work done to kick a set of 25-kg barbells and cause them to roll across the floor.

49.

Which situation requires the greatest average power?

a)

lifting a 5-kg block to a height of 2 m in 2 s

b)

pushing a block across a level surface with a net force of 10 N at a velocity of 3 m/s

c)

changing the kinetic energy of a rolling wheel from 15 J to 55 J in 20 s

d)

burning a 10-watt light bulb for 20 hrs

50.

What is deformation?

a)

gravitational potential energy

b)

change in the spring's length

c)

change in the force applied

51.

A stiff spring stores _____ potential energy per meter of stretch.

a)

more

b)

less

52.

What is the formula for KE?

a)


KE = mvKE\ =\ mv

b)

KE = 12v2KE\ =\ \frac{1}{2}v^2

c)

KE = 12mv2KE\ =\ \frac{1}{2}mv^2

d)

KE = 12m2vKE\ =\ \frac{1}{2}m^2v

53.

Roller coasters slow down when going up because . . .

a)

Someone stops it

b)

Kinetic energy gets converted to Potential energy as you are gaining more height.

c)

Kinetic energy increases because more height at the top.

d)

Velocity is increasing thus roller coaster slows down

54.

What happens when a ball is dropped?

a)

PE decreases and KE decreases

b)

PE increases and KE decreases

c)

PE decreases and KE increases

d)

PE increases and KE increases

55.

Energy and work are measured in _________.

a)

Newtons

b)

Joules

c)

m/s

d)

Meters

56.

The Law of Conservation of Energy states that ...

a)

Energy can be created but not destroyed

b)

Energy cannot be created or destroyed but can be transferred or transformed.

c)

Energy cannot be created but can be destroyed.

57.

Gravitational Potential energy depends on the _______ and _________ of an object.

a)

Height and friction

b)

Height and movement

c)

Height and mass

d)

Mass and friction

58.

What is the formula for Potential energy?

a)

PE = mg

b)

PE = mh

c)

PE = mgv

d)

PE = mgh

59.

The higher the velocity of an object, the ___________ the kinetic energy.

a)

higher

b)

lower

c)

equal

60.

__________ is the ability to cause change

a)

Energy

b)

Work

c)

Force

d)

Motion

61.
What is the equation for Newton's 2nd law?
a)
a = bc
b)
F = m/a
c)
F = ma
d)
a = b/c
62.

What are the units of force?

a)

kg

b)

N

c)

m/s

d)

m/s2

63.
When mass is 10 kg, acceleration is 2 m/s/s, what is force?
F = ma
a)
5 N
b)
20 N
c)
8 N
d)
12 N
64.
As force applied to a textbook increases, what happens to its acceleration?
a)
Stays the same
b)
Increases
c)
Decreases
d)
Opens
65.
What is Newton's First Law
a)
F=ma
b)
Every action has an equal and opposite reaction
c)
An object at rest stays at rest, an object in motion stays in motion. 
d)
Friction 
66.
After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals
a)
twice the force with which it was fired
b)
the same amount of force with which it was fired
c)
1/2 the force with which it was fired
d)
zero, since no force is requires to keep it moving. 
67.
Which of the following best describes Newton's 1st law?
a)
Objects keep doing what they are doing unless a force is applied
b)
Objects react to outside forces
c)
Unbalanced forces on an object keep it at rest
d)
More mass = more inertia
68.
The force of a cart doubles.  What happens to the cart's acceleration?
a)
It doubles
b)
It quadruples 
c)
It halves
d)
It quarters
69.
A student leaves a pencil on a desk and it stays there until I pick it up. 
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
70.
Two students are in a baseball game. The first student hits a ball very hard and it has a greater acceleration than the second student who bunts the ball lightly.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
71.
My cat eyeballs the christmas tree and decides to apply all of his mass directly to the center of the tree. This force causes the tree to accelerate down towards the ground.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
72.
A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
73.
What two quantities must I know to calculate something's speed?
a)
time and weight
b)
position and distance
c)
distance and time
d)
distance and speed
74.
A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec2.  What is the mass of the object?
a)
100kg 
b)
1,250kg
c)
50kg
d)
5kg
75.

If the net force is equal to zero, the forces acting on the object are

a)

balanced

b)

unbalanced

76.
Newton's _____ Law of Motion means that for every force there is a reaction force that is equal in size, but opposite in direction.
a)
First
b)
Second
c)
Third
d)
Fourth
77.
Acceleration due to gravity, g, is ____ m/sec2.
a)
4.9
b)
9.8
c)
19.6
d)
39.2
78.
According to Newton's _____ Law of Motion, when a hammer strikes and exerts force on a nail, the nail exerts an equal force back on the hammer.
a)
First
b)
Second
c)
Third
d)
Fourth
79.

If you push a skateboard with a force of 8 N and your mass is 80 kg, what is the force that the skateboard exerts on you?

a)

75 N

b)

8 N

c)

7N

d)

10 N

80.

The force that responds to the first force in a force pair

a)

Reaction Force

b)

Action Force

81.

The forces in a force pair are in ____ direction.

a)

Opposite

b)

Same

82.

Newton’s 3rd Law of motion states that any action will have a(n) ________and ______reaction

a)

Equal and similar

b)

Equal and different

c)

Equal and opposite

d)

Greater and opposite

83.

A book rests on a table. The force of gravity pulls down on the book with a force of 20N. What prevents the book from accelerating downward at 9.8m/s2?

a)

The table and the book are pushing back with an acceleration of 9.8m/s2.

b)

The table presses back up on the book with a force greater than 20N

c)

The inertia of the book is equal to the inertia of gravity

d)

The table presses back up on the book with an equal and opposite force of 20N

84.

Describe the other force in the action-reaction force pair

a)

The glove pushes the baseball to the right

b)

The glove pushes the baseball backward

c)

The glove pushes the baseball downward

d)

a. None of the above

85.
A bus hits a bug and the bug splatters on the windshield, which force is greater?
a)
The Bus
b)
The Bug
c)
They're the same
d)
Gravity acting on the bus
86.
How much force is applied to Ben's hand if he hits the wall with a force of 1,000 N?
a)
500 N
b)
1,000 N
c)
2,000 N
d)
Not possible to determine.
87.
Which law explains why when you put a book on a table the table pushes on the book
a)
3rd law
b)
4th law
c)
1st law
d)
2nd law
88.
Which law explains how rockets are launched into space?
a)
Newton's First Law of Motion
b)
Newton's Second Law of Motion
c)
Newton's Third Law of Motion
d)
Newton's Fourth Law of Motion
89.
What are Newton's 3 Laws? 
a)
Law of Action-Reaction, Law of Inertia and Law of Velocity
b)
Law of Speed, Law of Action-Reaction, Law of Force and Acceleration
c)
Law of Inertia, Law of Force and Acceleration, and Law of Action-Reaction
d)
Law of Mass and Acceleration, Law of Action-Reaction, and Law of Inertia
90.
Which of Newton's laws states:  Objects at rest remain at rest and objects in motion remain in motion unless acted upon by an unbalanced force?  
a)
1st Law
b)
3rd Law
91.

A nickname for Newton's 3rd Law of Motion might be...

a)

Action/Reaction

b)

F=m*a

c)

The law of inertia

92.
When Ronda Rousey got kicked in the face, What is the interaction pair?
a)
The foot and the face
b)
Ronda Rousey and media criticism 
c)
The foot and the air flow
d)
Ronda Rousey and the floor
93.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
94.
Name the missing force...
a)
tension force
b)
frictional force
c)
normal force
d)
spring force
95.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
96.

Whenever an object is moving, there is always this force opposing the motion:

a)

inertia

b)

momentum

c)

friction

d)

applied force

97.

The force exerted by ropes and chains is called

a)

tension

b)

normal

c)

elastic

d)

mechanical

98.

The car in the picture is moving at a constant velocity. What forces does the car experience?

a)

Gravity

b)

Gravity and Normal

c)

Gravity, Normal, and Friction

d)

Gravity, Normal, Friction, and Applied

99.

How many forces are on a leopard laying stationary on a log?

a)

1

b)

2

c)

3

d)

4

100.

The model shows forces acting on a box when it is sliding down the ramp.

What would most likely happen to the motion of the box if you poured oil on the ramp?

a)

It will slow the box because the force of friction will be increased.

b)

It will speed up the box because the force of friction will be increased.

c)

It will slow the box because the force of friction will be reduced.

d)

It will speed up the box because the force of friction will be reduced.

101.

If an unbalanced force acts on an object at rest, the object will move in the direction of the force. Which of the following best models an object with unbalanced forces acting on it?

a)
b)
c)
d)
102.

A group of students want to test the effect of balanced forces on the motion of objects with different masses. They conducted trails with 10-gram, 20-gram, and 30-gram blocks. They applied 100 Newtons of force to each side of the blocks as shown in each trial.

Which hypothesis will most likely be supported by the results of the investigation?

a)

When a balanced force is applied the block with the greatest mass will move fastest.

b)

When an unbalanced force is applied the block with the least mass will move fastest.

c)

When a balanced force is applied the speed of an object will not change.

d)

When an unbalanced force is applied the speed of an object will not change.

103.

A student recorded the distance than an object moved at 5 second intervals. The graph below shows the motion of an object.

Which of the following best describes the data in the graph?

a)

Time is the dependent variable which is graphed on the "Y" axis.

b)

Time the is dependent variable which is graphed on the "X" axis.

c)

Distance is the dependent variable which is graphed on the "Y" axis.

d)

Distance is the dependent variable which is graphed on the "X" axis.

104.

An engineer wanted to design a floor for a warehouse. Workers in the warehouse would need to push heavy boxes across the floor. The engineer tested four different materials by sliding a box across the surface and measuring the distance it took the box to stop.

Which of the following best explains which material would work best for the warehouse floor?

a)

The tile because it had the least friction.

b)

The wood because it would be easiest to push the boxes on.

c)

The dirt because it has the least friction.

d)

The asphalt because it has the most friction.

105.
The unit for force is a called a: 
a)

Galileo

b)

Newton

c)

Aristotle

106.
The overall force acting on an object after all the forces are combined is called a 
a)
net force
b)
unbalanced force
c)
balanced force
107.
When the net force is zero what type of force is acting on the objects? 
a)
balanced force
b)
unbalanced force
108.
A type of friction that acts on objects that are not moving. 
a)
static
b)
rolling
c)
sliding
109.
  A type of friction that occurs when a round object rolls across a flat floor. 
a)
static
b)
rolling
c)
sliding
110.
A force that opposes motion of an object through a fluid is called: 
a)
static friction
b)
rolling friction
c)
fluid friction 
111.
The constant velocity of a falling object when the force of air resistance equals the force of gravity is called: 
a)
terminal velocity
b)
projectile motion
c)
sliding friction
112.
If I kick a soccer ball across the field, what vocabulary word tells me why the ball would slow down in the grass?
a)
acceleration
b)
friction
c)
gravity
113.
Which force produces a change in motion?
a)
unbalanced force
b)
balanced force
c)
gravitational force
d)
frictional force
114.
What Unit do we Measure Force in? 
a)
Newtons
b)
Joules
c)
Force
d)
Kilograms
115.
What kind(s) of objects have inertia?
a)
all objects with mass
b)
only objects at rest
c)
only objects in motion
d)
only objects whose motion is being changed
116.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
117.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
118.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
119.

Friction is a force that acts ...

a)

in the same direction as the motion

b)

opposite to the direction of the motion

c)

opposite to the applied forces

d)

the same direction as the applied force

120.
Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 
a)
feathers 
b)
iron
c)
same
d)
depends on their friction
121.
You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.
a)
20N 
b)
40N 
c)
10N 
d)
70N
122.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the net force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
123.
Balanced or Unbalanced?
a)
Balanced 
b)
Unbalanced
124.
What happens when two forces act in the same direction?
a)
They cancel each other out.
b)
The stronger one prevails.
c)
Their strengths are added.
d)
Their sum divided by the two is the total force.
125.
Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 
a)
That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
b)
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
c)
That Jupiter’s and Earth’s gravitational forces are equal.
d)
Mass has no effect on the gravitational force between two objects
126.

A student wished to design an investigation to determine the effect of changing the mass of an object when an unbalanced force is applied the object.

What should she use as the independent variable in her investigation?

a)

Time

b)

Force

c)

Mass

d)

Speed

127.
When an object is experiencing a net torque
a)
it is in dynamic equilibrium.
b)
it is in static equilibrium.
c)
it is rotating.
d)
it is translating.
128.

Two children are sitting on a see-saw, as shown. Calculate the distance the 500-N child should sit from the fulcrum in the center (pivot) of the lever to balance the see-saw.

a)

1.8 m

b)

3m

c)

5 m

d)

1 m

129.

If the torque required to loosen a nut on the wheel of a car has a magnitude of 60.0 N• m, what minimum perpendicular force must be exerted by a mechanic at the end of a 0.45 m wrench to loosen the nut?

a)

.666 Nm

b)

133.3 N

c)

66.7 N

d)

13.3 Nm

130.

If the torque required to loosen a nut on the wheel of a car has a magnitude of 60.0 N• m, for a 0.45 m wrench to loosen the nut, how much torque would be needed if a pipe extended the length of the wrench to 0.90 m?

a)

60 Nm

b)

30 Nm

c)

120 Nm

d)

54 Nm

131.
The easiest way to open a heavy door  is by applying the force
a)
Near the hinges
b)
In the middle of the door
c)
At the edge of the door far from the hinges
d)
At the top of the door
132.

Why are you more stable when riding a bicycle at a faster speed?

a)

You have more mass

b)

The wheels have angular momentum

c)

It's not easier to ride at a faster speed

d)

The bike has more momentum

133.

A skater start spinning on the tips of her skates at low angular velocity with arm outstretched.

What would happen when she brings her arms close to her body

a)

She will spin slower

b)

She will spin faster

c)

She will spin at the same velocity

134.

If a child is sitting on the outside edge of a merry-go-round and you push it to double the rotational velocity (ω) from 5 rpm to 10 rpm, what happens to the angular momentum (L)?

a)

the angular momentum doubles

b)

the angular momentum is reduced by half

c)

the angular momentum quadruples

135.

Why would it be harder to stop the merry-go-round at 10 rotations per minute that when it was going 5 rotations per minute?

a)

the angular momentum is greater with a higher angular velocity and will require a larger torque to stop the motion.

b)

it won't because the angular momentum is the same for both angular speeds.

136.

What happens to her rotational inertia when a figure skater brings in her arms?

a)

Increase her rotational inertia

b)

Decrease her rotational inertia

c)

has no affect

137.

Why does an object experiencing uniform circular motion have an acceleration?

a)

because it is changing speed

b)

because it is changing direction

c)

because it is moving in a straight line

d)

because it has mass

138.

In uniform circular motion, which two variables point toward the center of the circle?

a)

the centripetal force and the acceleration

b)

the velocity and the mass

c)

the period and the mass

d)

the time and the radius

139.

The _______________________ supplies the centripetal force requirement for the car to move in a horizontal circle. Without it, the car would turn its wheels but would not move in a circle (as is the case on an icy surface).

a)

friction force

b)

centrifugal force

c)

normal force

d)

applied force

140.

Which of the following statements is true?

a)

As the Earth orbits the Sun, the Earth's acceleration vector is toward the Sun.

b)

If the Moon suddenly broke free of its orbit around the Earth, it would crash into the Earth.

c)

The International Space Station remains in Earth orbit because of its mass.

d)

The Earth and Neptune take the same amount of time to make one orbit around the Sun.

141.

For the FLYING PIG diagram, Does the pig accelerate in the vertical direction?

What does this tell you about the magnitude of the vertical component of T and mg? (If you don't know, ask Irene ;)

4 lines
142.

These are the formulas you will use on the test.

4 lines
143.

A Ferris wheel is turning at a constant rate. It completes two revolutions every two minutes. What is the angular velocity of the Ferris wheel, in rad/s?

(a)  

144.

If the Ferris wheel's radius is 15 meters, what is the tangential velocity of the riders?

(a)  

145.

If the Ferris wheel's radius is 30 meters, what is the tangential velocity of the riders?

(a)  

146.

At t = 5s, what is the Ferris wheel's angular velocity?

(a)  

147.

At t = 5s, what is the Ferris wheel's angular displacement?

(a)  

148.

Linear motion is often compared to rotational motion. Most of the variables in linear motion have "analogs" or comparable versions within rotational motion. Fill out the table below with your knowledge of rotational motion. Some of the table has already been filled out for you. You may need to research some of these.

a)

Angular displacement → Position (Δx)

b)

Angular velocity → Velocity (v)

c)

Angular acceleration → Acceleration (a)

d)

Moment of inertia → Mass (m)

e)

Torque → Force (F)

149.

Match the following

a)

α\alpha

1.

angular acceleration

b)

τ\tau

2.

torque

c)

ω\omega

3.

angular velocity

d)

θ\theta

4.

angular displacement

e)

ι\iota

5.

moment of inertia

150.

Which of the following is the rotational analog of linear momentum?

a)

Angular momentum

b)

Angular velocity

c)

Angular displacement

d)

Angular acceleration

151.

If the moment of inertia of a rotating object doubles, how does this affect its angular velocity if the angular momentum remains constant?

a)

The angular velocity remains the same

b)

The angular velocity is halved

c)

The angular velocity doubles

d)

The angular velocity is quadrupled

152.

When comparing the kinetic energy of linear motion (1/2 mv^2) to rotational motion, which of the following formulas represents the kinetic energy of an object in rotational motion?

a)

1/2 Iω^2

b)

1/2 mv^2

c)

Iω

d)

mv^2

153.

There are 400 ___________ in one revolution of a circle.

a)

Gradiens

b)

Radians

c)

Degrees

d)

None of the Above

154.

Match the following quantities with their units

a)

aa

1.

ms2\frac{m}{s^2}

b)

τ\tau

2.

NmNm

c)

pp

3.

kg mskg\ \frac{m}{s}

d)

K.EK.E

4.

JJ

e)

II

5.

kgm2kgm^2

155.

The "centrifugal force" describes what actual physics phenomena?

a)

Mass

b)

Weight

c)

Rotational Motion

d)

Inertia

156.

What does the term "centripetal" mean?

a)

Center-fleeing

b)

Center-seeking

c)

Rotation

d)

Circular

157.

What does the term "tangential" mean?

a)

Moving Forward

b)

Moving in a Circle

c)

Moving in a straight line

d)

Moving Around

158.

In uniform circular motion, there is a

a)

Constant Velocity

b)

Constant Angular Velocity

c)

Zero Acceleration

d)

Net Tangential Acceleration

159.

There are 2π ___________ in one revolution of a circle.

a)

Gradiens

b)

Radians

c)

Degrees

d)

None of the Above

160.

There are 360 ___________ in one revolution of a circle.

a)

Gradiens

b)

Radians

c)

Degrees

d)

None of the Above

161.

As an object rotates, the change in the angle is called _______ ____ and represented by ________

a)

angular displacement AND s

b)

angular displacement AND θ

c)

rotational displacement AND θ

d)

rotational displacement AND s

162.

The angular velocity is represented by the Greek letter ____.

a)

ω

b)

θ

c)

α

d)

σ

163.

The angular acceleration is represented by the Greek letter ____.

a)

ω

b)

θ

c)

α

d)

σ

164.

To convert between linear velocity and angular velocity you used ___________.

a)

r =vω

b)

ω = vr

c)

ω=r/v

d)

v =rω

165.

The relationship between angular acceleration and linear acceleration is _________

a)

α = a/r

b)

a = α/r

c)

α =ar

d)

a = αr

166.

To convert between revolutions and radians you must _________.

a)

Multiple the number of revolutions by 2π

b)

Divide the number of revolutions by 2π

c)

Divide 2π by the number of revolutions

d)

None of the above

167.

The frequency of an object is ________.

a)

the number of complete revolutions made by an object in 1 s.

b)

the time it takes for one revolution of an object.

c)

Neither of the other answers

d)

Both of the other answers

168.

To calculate the frequency you _______.

a)

divide the number of revolutions by the angular velocity.

b)

divide the number of radians by the angular velocity.

c)

divide the angular velocity by the number of radians.

d)

divide the angular velocity by the number of revolutions.

169.

Torque causes angular acceleration.

a)

True

b)

False

170.

Which of the following is NOT a condition of static equilibrium?

a)

The angular velocity of the object is constant.

b)

The velocity of the object is changing.

c)

The angular velocity of the object is zero.

d)

The velocity of the object is zero.

171.

Torque can be described as

a)

how effectively a force causes a rotation

b)

the ratio of mass to angular acceleration

c)

the ratio of moment of inertial to angular acceleration

d)

None of the other answers

172.

The resistance to rotation is __

a)

angular inertia.

b)

torque

c)

the center of mass

d)

the moment of inertia.

173.
When an object is experiencing a net torque
a)
it is in dynamic equilibrium.
b)
it is in static equilibrium.
c)
it is rotating.
d)
it is translating.
174.

Two children are sitting on a see-saw, as shown. Calculate the distance the 500-N child should sit from the fulcrum in the center (pivot) of the lever to balance the see-saw.

a)

1.8 m

b)

3m

c)

5 m

d)

1 m

175.

If the torque required to loosen a nut on the wheel of a car has a magnitude of 60.0 N• m, what minimum perpendicular force must be exerted by a mechanic at the end of a 0.45 m wrench to loosen the nut?

a)

.666 Nm

b)

133.3 N

c)

66.7 N

d)

13.3 Nm

176.
The easiest way to open a heavy door  is by applying the force
a)
Near the hinges
b)
In the middle of the door
c)
At the edge of the door far from the hinges
d)
At the top of the door
177.

A skater start spinning on the tips of her skates at low angular velocity with arm outstretched.

What would happen when she brings her arms close to her body

a)

She will spin slower

b)

She will spin faster

c)

She will spin at the same velocity

178.

If a child is sitting on the outside edge of a merry-go-round and you push it to double the rotational velocity (ω) from 5 rpm to 10 rpm, what happens to the angular momentum (L)?

a)

the angular momentum doubles

b)

the angular momentum is reduced by half

c)

the angular momentum quadruples

179.

Why does an object experiencing uniform circular motion have an acceleration?

a)

because it is changing speed

b)

because it is changing direction

c)

because it is moving in a straight line

d)

because it has mass

180.

In uniform circular motion, which two variables point toward the center of the circle?

a)

the centripetal force and the acceleration

b)

the velocity and the mass

c)

the period and the mass

d)

the time and the radius

181.

Which of the following statements is true?

a)

As the Earth orbits the Sun, the Earth's acceleration vector is toward the Sun.

b)

If the Moon suddenly broke free of its orbit around the Earth, it would crash into the Earth.

c)

The International Space Station remains in Earth orbit because of its mass.

d)

The Earth and Neptune take the same amount of time to make one orbit around the Sun.

182.

If the Ferris wheel's radius is 15 meters, what is the tangential velocity of the riders?

(a)  

183.

If the Ferris wheel's radius is 30 meters, what is the tangential velocity of the riders?

(a)  

184.

Linear motion is often compared to rotational motion. Most of the variables in linear motion have "analogs" or comparable versions within rotational motion. Fill out the table below with your knowledge of rotational motion. Some of the table has already been filled out for you. You may need to research some of these.

a)

Angular displacement → Position (Δx)

b)

Angular velocity → Velocity (v)

c)

Angular acceleration → Acceleration (a)

d)

Moment of inertia → Mass (m)

e)

Torque → Force (F)

185.

Match the following

a)

α\alpha

1.

angular acceleration

b)

τ\tau

2.

torque

c)

ω\omega

3.

angular velocity

d)

θ\theta

4.

angular displacement

e)

ι\iota

5.

moment of inertia

186.

If the moment of inertia of a rotating object doubles, how does this affect its angular velocity if the angular momentum remains constant?

a)

The angular velocity remains the same

b)

The angular velocity is halved

c)

The angular velocity doubles

d)

The angular velocity is quadrupled

187.

When comparing the kinetic energy of linear motion (1/2 mv^2) to rotational motion, which of the following formulas represents the kinetic energy of an object in rotational motion?

a)

1/2 Iω^2

b)

1/2 mv^2

c)

Iω

d)

mv^2

188.

There are 400 ___________ in one revolution of a circle.

a)

Gradiens

b)

Radians

c)

Degrees

d)

None of the Above

189.

The "centrifugal force" describes what actual physics phenomena?

a)

Mass

b)

Weight

c)

Rotational Motion

d)

Inertia

190.

What does the term "centripetal" mean?

a)

Center-fleeing

b)

Center-seeking

c)

Rotation

d)

Circular

191.

What does the term "tangential" mean?

a)

Moving Forward

b)

Moving in a Circle

c)

Moving in a straight line

d)

Moving Around

192.

In uniform circular motion, there is a

a)

Constant Velocity

b)

Constant Angular Velocity

c)

Zero Acceleration

d)

Net Tangential Acceleration

193.

The frequency of an object is ________.

a)

the number of complete revolutions made by an object in 1 s.

b)

the time it takes for one revolution of an object.

c)

Neither of the other answers

d)

Both of the other answers

194.

Which of the following is NOT a condition of static equilibrium?

a)

The angular velocity of the object is constant.

b)

The velocity of the object is changing.

c)

The angular velocity of the object is zero.

d)

The velocity of the object is zero.

195.

The resistance to rotation is __

a)

angular inertia.

b)

torque

c)

the center of mass

d)

the moment of inertia.

196.

What is the formula for calculating the momentum of a particle?

a)

F→=ma→\overrightarrow{F}=m\overrightarrow{a}

b)

K=12mv2K=\frac{1}{2}mv^2

c)

p→=mv→\overrightarrow{p}=m\overrightarrow{v}

d)

ρ=mV\rho=\frac{m}{V}

197.
The impulse-momentum theorem states that
a)
the impulse on an object is equal to the change in momentum it causes 
b)
the force on a moving object is equal to the magnitude of the impulse.
c)
the impulse on an object is greater than the change in momentum it causes 
d)
the impulse on an object is less than the change in momentum it causes
198.
A big fish swims upon and swallows a small fish at rest. After lunch, the big fish has less
a)
momentum
b)
velocity
c)
mass
199.
Softer landings tend to
a)
increase impact force
b)
increase force
c)
increase collision time
d)
increase change in momentum
200.

A collision in which the kinetic energy is conserved is called...

a)

normal force

b)

elastic collision

c)

inelastic collision

d)

completely inelastic collision