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Unit 2 Forces Review Questions Complete

Total questions: 181

Worksheet time: 7hrs 10mins

Name
Class
Date
1.


In the context of forces, what could it be?

Select 2


a)

Push

b)

Pull

c)

Lift

d)

Drop

2.

Without forces, what would happen in the universe?

a)

Everything would change

b)

Nothing would change

c)

Some things would change

d)

Change is unpredictable

3.

Fill in the blank: The direction of a force can be described as ______, Right, Up, Down, East, West, etc.

a)

Left

b)

Forward

c)

Reverse

d)

Sideways

4.

How is the strength of a force indicated when using arrows?

a)

By the color

b)

By the length

c)

By the width

d)

By the shape

5.

What does a longer arrow represent when describing forces?

a)

Weaker

b)

Stronger

c)

Neutral

d)

Balanced

6.

What is the standard unit for measuring force in the metric system?

a)

Joules

b)

Pounds

c)

Newtons

d)

kg

7.

Fill in the blank: The symbol for gravitational force is ____.

a)

Fg

b)

W

c)

Fw

d)

g

8.

Weight is a force. Like all forces, weight is measured in ______ in the metric system.

a)

kilograms (kg)

b)

Newtons (N)

c)

Pounds (lbs)

d)

Joules (J)

9.


An object's mass is always the same, no matter where the object is located. True or False?

a)

True

b)

False

10.

Why is a person's weight less on the moon than on Earth?

a)

The moon has no gravity

b)

Gravity is weaker

c)

The person is farther from the earth

d)

The moon is smaller

11.


If the surface is sloped, the normal force would point 90 degrees up from that sloped surface. True or False?

a)

True

b)

False

12.

Friction is greater when sliding on ______ compared to sliding on ice.

Select all that apply

a)

grass

b)

sand

c)

wood

13.

Friction always generates ______.

a)

Light

b)

Sound

c)

Heat

d)

Electricity

14.

Air resistance mostly depends on which factor?

a)

Mass

b)

Velocity

c)

Temperature

d)

Pressure

15.

ill in the blank: The symbol for applied force is _____.

a)

Fg

b)

Ff

c)

Fapp

d)

Fc

16.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
17.
Name the missing force...
a)
applied force
b)
weight force
c)
tension force
d)
drag
18.
Name the missing force...
a)
normal force
b)
applied force
c)
frictional force
d)
tension force
19.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
20.
What is the net force in this picture?
a)
50 Newtons to the right
b)
950 Newtons to the right
c)
950 Newtons to the left
d)
50 Newtons to the left
21.
8 N to the left , and 4 N to the right. Find the net force. Is this balanced 
a)
12 N Right  No
b)
4 N Left  No
c)
12 N Right  Yes
d)
4 N Left  Yes
22.

A box has three forces applied to it in the horizontal direction: a 50 N force to the right, a 30 N force to the left & a 20 N force to the right. What is the net force on the box?

a)

40 N to the left

b)

40 N to the right

c)

100 N to the right

d)

100 N to the left

23.

The free body diagram of four boxes are shown below. Which box is in equilibrium?

a)
b)
c)
d)
24.

What does it mean for an object to be in equilibrium? Select ALL correct answers.

a)

It has no net force acting on it.

b)

The forces acting on the object all cancel out.

c)

The forces acting on an object balance out.

d)

The sum of all the forces acting on an object is 0.

e)

The object is ONLY at rest.

25.
What is the direction of the force of gravity acting on the box?
a)
down the ramp to the right
b)
straight up
c)
straight down
d)
up the ramp to the left
26.
When completing a free-body diagram, how should you draw the force arrows on the "body"?
a)
with the arrow tail touching the body
b)
with the arrow tip touching the body
c)
it does not need to touch the body
d)
it doesn't matter, tail or tip can touch
27.

Which diagram best shows person pushing a couch (accelerating) across the floor?

a)
b)
c)
d)
28.

A man standing on a scale in an elevator notices that the scale reads 40 newtons greater than his normal weight. Which type of movement of the elevator could cause this greater-than-normal reading?

a)

accelerating upward

b)

accelerating downward

c)

moving upward at a constant speed

d)

moving downward at a constant speed

29.

Which of the following is possible for an object with balanced forces acting on it? (Choose all that apply)

a)

at rest

b)

moving at constant speed

c)

changing direction

d)

slowing down

30.

Which of the following is possible for an object with unbalanced forces acting on it? (choose all that apply)

a)

Moving to the right with a constant speed of 3 m/s

b)

Moving to the left with rightward acceleration

c)

changing direction

d)

at rest

31.

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

a)

inertia

b)

momentum

c)

friction

d)

applied force

32.

Which of these include only contact forces?

a)

Fapp Fg Fnorm

b)

Fapp Ftens Fnorm

c)

Fb Fapp Fg

d)

Fair Fnorm Fg

33.

The force that keeps objects on top of surfaces instead of letting them sink into the surface is known as:

a)

normal

b)

abnormal

c)

static

d)

inertia

34.
What is a normal force?
a)
It always opposes gravity.
The same as a frictional force.
b)
It is equivalent to the weight of an object.
c)
It acts perpendicular to a contact surface.
d)
It is equivalent to inertia.
35.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
36.
A type of friction that occurs when air pushes against a moving object causing it to decelerate.
a)
surface area
b)

air resistance (drag)

c)
velocity
d)
gravity 
37.

Choose the word that best fits this definition:


An influence that can change the motion of an object. A push or pull that acts upon an object as a result of that objects interactions with its surroundings.

a)

Inertia

b)

Forces

c)

Free Body Diagram

d)

Friction

38.

Choose the word that best fits this definition:


A graphical illustration used to visualize the applied forces, moments, and resulting reactions on a body in a given condition.

a)

Inertia

b)

Forces

c)

Free Body Diagram

d)

Friction

39.

Choose the word that best fits this definition:


Defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.

a)

Mass

b)

Weight

c)

Net Force

d)

Normal Force

40.

Choose the word that best fits this definition:


The universal force of attraction acting between all matter. It is by far the weakest known force in nature.

a)

Tension Force

b)

Coefficient of Friction

c)

Gravitational Force

d)

Magnitude

41.
Name the missing force...
a)
tension force
b)
frictional force
c)
normal force
d)
spring force
42.

If the floor is pushing you up, what force is this called?

a)

Normal Force

b)

Air Resistant Force

c)

Frictional Force

d)

Applied Force

43.

What does it mean when the vector sum of all forces is zero?

a)

There is no net force acting on the object

b)

There is a positive net force acting on the object

c)

There is a negative net force acting on the object

d)

The object is experiencing an unbalanced force

44.

A force that causes an object to accelerate must be:

a)

At least 10 N

b)

A balanced force

c)

A total of 0 net force

d)

An unbalanced force

45.

Choose one of the following choices that happens after a balanced force hits an object

a)

No change in motion

b)

It speeds up

c)

It slows down

d)

It changes direction

46.

After a football is thrown, what forces are acting on it?

a)

The initial contact force and gravity

b)

Gravity and air resistance

c)

Initial velocity and normal force

d)

Gravity and normal force

47.

If a soccer ball was moving to the right towards the goal with a force of 27 N, what would cause the ball to be in equilibrium?

a)

An equal force in the opposite direction

b)

An unbalanced force of gravity

c)

The normal force that opposes gravity

d)

The ball is in equilibrium because only gravity is acting on it

48.

What is the effect of an unbalanced force on an object's motion?

a)

It causes the object to stop

b)

It causes the object to accelerate

c)

It has no effect on the object's motion

d)

It causes the object to decelerate

49.

What is the net force on an object in equilibrium?

a)

Equal to the weight of the object

b)

Zero

c)

Equal to the mass of the object

d)

Depends on the speed of the object

50.

What is the role of friction in the motion of a rolling ball?

a)

It speeds up the ball

b)

It slows down the ball

c)

It has no effect on the ball

d)

It changes the direction of the ball

51.

If the net force points in the same direction an object is moving the object

a)

speeds up

b)

slows down

c)

changes direction

d)

keeps steady speed

52.

What is Newton's 1st Law of Motion?

a)

An object in motion stays in motion unless acted upon by an external force.

b)

An object at rest stays at rest unless acted upon by an external force.

c)

Both A and B.

d)

None of the above.

53.

Newton's First Law is also called the Law of __________.

a)

Momentum

b)

Thermodynamics

c)

Inertia

d)

Movement

54.

Inertia depends upon the _________ of an object.

a)

mass

b)

force

c)

weight

d)

momentum

55.

In Newton's cradle, the number of balls that move after one ball is released is an example of ____.

a)

Energy conservation

b)

Inertia

c)

Friction

d)

Centrifugal forces

56.
a)
This is an example of Newton's First Law.
b)
This is an example of Newton's Second Law.
c)
This is an example of Newton's Third Law.
57.
a)
This is an example of Newton's First Law.
b)
This is an example of Newton's Second Law.
c)
This is an example of Newton's Third Law.
58.
This is an example of..........
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
59.

What mass has more inertia?

a)

1000kg of bricks

b)

1000kg ton of feathers

c)

2kg toy car

d)

a commercial jet

60.

Newton's three Laws of Motion describe the motion of:

a)

Only small objects

b)

Only large objects

c)

Any object

d)

Only objects on earth

61.

Fill in the blank: The word 'inertia' is derived from the Latin word 'inert', meaning ______.

a)

Full of energy

b)

Lacking the ability to move

c)

Constantly changing

d)

Moving quickly

62.

What happens to the motorcycle rider when the motorcycle crashes into the wall?

a)

He stops immediately

b)

He continues moving forward

c)

He moves backward

d)

He falls to the side.

63.

What immediate force is acting directly on the rider's body when the motorcycle hits a wall?

a)

No force

b)

Centripetal force

c)

Frictional force

d)

Air resistance

64.

What happens to the rider's body when no force acts directly on it?

a)

It stops

b)

It accelerates

c)

It continues moving

d)

It changes direction.

65.

Fill in the blank: The force that acts toward the center of a circular path is known as ________.

a)

gravitational force

b)

centripetal force

c)

centrifugal force

d)

frictional force

66.

In the Gravitron ride, what is responsible for the circular motion pushing outward keeping people against the wall of the ride?

a)

Inertia

b)

Centripetal force

c)

Gravitational force

d)

Friction

67.

True or False: Centrifugal force exists in the context of a Gravitron ride.

a)

True

b)

False

68.

What does the term 'centripetal' refer to in circular motion?

a)

Inward force

b)

Outward force

c)

Upward force

d)

Downward force

69.

Which direction would the person move if the walls suddenly disappeared while they were in position 3 in the picture?

a)

Down

b)

Up

c)

Right

d)

Left

70.

Which direction would the person move if the walls suddenly disappeared while they were in position 2 in the picture?

a)

Down

b)

Up

c)

Right

d)

Left

71.

Which direction would the person move if the walls suddenly disappeared while they were in position 1 in the picture?

a)

Down

b)

Up

c)

Right

d)

Left

72.

Which direction would the person move if the walls suddenly disappeared while they were in position 4 in the picture?

a)

Down

b)

Up

c)

Right

d)

Left

e)

Up-Left

73.

Newton's Second Law can also be stated as _____________.

a)

the Law of Inertia

b)

F=ma

c)

Every action has an equal but opposite reaction.

74.

What is the unit for acceleration?

a)

m/s^2

b)

m/s

c)

Newtons

d)

grams

75.

What Unit do we Measure Force in?

a)

Newtons

b)

Joules

c)

Volts

d)

Lumens

76.

F= mass * acceleration

A 20 kg bike accelerates at 10 m/s2. what is the force acting upon it?

a)

25 Newtons

b)

20 Newtons

c)

200 Newtons

d)

10 Newtons

77.

An object of mass 10 kg is accelerated upward at 2 m/s2. What force is required?

a)

20 N

b)

2 N

c)

5 N

d)

0 N

78.

Will it take more force to push an empty shopping cart or a shopping cart that is full?

a)

The empty shopping cart

b)

The full shopping cart

c)

They will take the same amount of force

d)

Depends on what is in the full shopping cart

79.
When force is 20 N, mass is 5 kg, what is acceleration?
F = ma
a)
25 m/s/s
b)
5 m/s/s
c)
100 m/s/s
d)
4 m/s/s
80.

Football A has a greater mass than football B. Which football will have greater acceleration when both are thrown with the same force in the same direction?

a)

Football A

b)

Football B

c)

They will have the same acceleration

d)

Mass has no effect on acceleration

81.
An object accelerates 5 m/s2 when a force of 20 newtons is applied to it. What is the mass of the object?
a)
4 Kg
b)
20 Kg
c)
0.5 Kg
d)
2 Kg
82.

According to Newton's second Law, which would take more force to slow down?

a)

The silver car

b)

The green car

c)

They would both take the same force

83.
The increasing speed of a falling object is caused by _____________.
a)
force
b)
mass
c)
speed
d)
gravity
84.
A ball is rolling on the floor and a force pushes it in the same direction, what will happen?
a)
The ball will go faster.
b)
The ball will slow down.
c)
The ball will stop. 
d)
The ball will fly in the air.
85.

A golf ball and a bowling ball are both accelerating at the same rate. Which one requires a greater force?

a)

golf ball

b)

bowling ball

c)

Same force

86.
Accelerations are produced by
a)
forces.
b)
 velocities.
c)
 accelerations.
d)
 masses.
87.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
88.
45 m/s2 is the... 
a)
Mass
b)
Force 
c)
Acceleration
d)
weight
89.

Jenny applies a 60 N force to a 20 Kg cart, what is the acceleration of the cart if friction can be neglected?

a)

1200 m/s2

b)

0.33 m/s2

c)

20 m/s2

d)

3 m/s2

90.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
91.
Name the missing force...
a)
weight force
b)
normal force
c)
applied force
d)
frictional force
92.

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

a)

inertia

b)

momentum

c)

friction

d)

applied force

93.
Calculate the net force acting upon the object.
a)

10 N up

b)

20 N down

c)

10 N down

d)

22.4 N up

94.
Calculate the net force acting upon the object.
a)

10 N right

b)
0 N
c)

14.1 N right

d)

20 N up

95.

This object would be moving (pick all that are correct):

a)

up

b)

down

c)

left

d)

right

96.

The down-arrow in this diagram is most-likely:

a)

gravity

b)

normal

c)

a push or pull

d)

friction

97.

Which diagram best shows person pushing a couch (accelerating) across the floor?

a)
b)
c)
d)
98.
"If we apply a ___________ to an object, its __________________ will change and it will  ______________."
a)
force, accelerate, gravity
b)
accelerate, inertia, gravity
c)
force, velocity, accelerate
d)
velocity, gravity, inertia
99.

Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?

a)

the feather

b)

the metal bolt

c)

They would hit the ground at the same time.

d)

They would be suspended (floating) in a vacuum.

100.
If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by 
a)
about 5 m/s.
b)
about 10 m/s.
c)
about 15 m/s.
d)
a rate that depends on its initial speed.
101.

A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:

a)

6m/s

b)

36m/s

c)

60m/s

d)

12m/s

102.

15. Joe jumps out of a helicopter. Which free body diagram(FBD) illustrates Joe's free fall motion?

a)
b)
c)
d)
103.

An object travelling at terminal velocity moves at a steady speed.

a)

True

b)

False

104.

Which diagram shows the forces acting on Peter when he is falling at Terminal Velocity?

a)

1

b)

2

c)

3

105.

When a skydiver is falling what happens to

a) her velocity

b) the air resistance?

a)

a) Increases

b) increases

b)

a) increases

b) decreases

c)

a) increases

b) stays the same

d)

a) stays the same

b) increases

106.
The amount of force pushing on an area is the definition of....
a)
Fluid
b)
Viscosity
c)
Barometer
d)
Pressure
107.
Pressure decreases when the surface area over which a force is applied increases
a)
True
b)
False
108.

Which situation produces more pressure on the floor?

a)

standing on one foot

b)

standing on two feet

c)

standing on four feet

d)

all produce the same pressure

109.

Newton's Second Law says that F=m*a.

Therefore, if the force increases, then the acceleration

a)

increases

b)

decreases

c)

stays the same

110.

Newton's Second Law says that F=m*a.

Therefore, if the mass increases, then the acceleration

a)

increases

b)

decreases

c)

stays the same

111.
An empty truck and a fully loaded truck are next to each other at a traffic light. When the light turns green, the lighter truck increases speed more quickly. Which of these best explains this situations
a)
Newton's first law
b)
Newton's second law
c)
Newton's third law
d)
Conservation of momentum
112.

which box has more acceleration?

a)

top

b)

bottom

113.
Newton's Third Law States...
a)
Objects in motion stay in motion and objects at rest stay at rest
b)
Force is equal to mass times acceleration
c)
For each action there is an equal and opposite reaction
114.
An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...
a)
Air resistance against the bow
b)
the arrow's push against the bowstring
c)
the grip of the archer's hand on the bow
115.
A baseball player bats a ball with a force of 1,000 N. The ball exerts a reaction force (without any additional forces action on it) against the bat of...
a)
Less than 1, 000 N
b)
1,000 N
c)
More than 1,000 N
116.
What is the reaction force to a foot pushing down on the floor?
a)
The foot going through the floor
b)
The floor pushing back against the foot
c)
The floor breaking to the foot
117.
The ____ of an object is the force of gravity on the object.
a)
mass
b)
weight
c)
volume
d)
density
118.
For every action there is an equal and opposite re-action.
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
119.
Which best explains why we are able to accelerate forward when starting to run?
a)
As one leg moves backward, it provides an equal and opposite force for the other foot to move forward.
b)
No acceleration takes place. Runners are always at a fixed velocity.
c)
The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.
d)
The runner's upper body quickly leans forward, causing the entire body to begin accelerating forward
120.
When a large truck pushes a small car with a given force, the small car is applying an equal and opposite force on the truck.
a)
True
b)
False
121.

What happens when two objects, such as a baseball and a bat, collide?

a)

They hit each other with the same force in the same direction.

b)

They hit each other with the same force in opposite directions.

c)

They hit each other with unequal force in opposite directions.

d)

One remains still while the other one moves in the same direction.

122.
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
123.
The ____ of an object is a fundamental measure of the amount of matter in the object.
a)
mass
b)
weight
c)
volume
d)
dimension
124.

Newtons law states that for every action, there is an_________ reaction

a)

unequal and opposite

b)

stronger and opposite

c)

equal and similar

d)

equal and opposite

125.

Force always come in________

a)

waves

b)

triplets

c)

pairs

126.

Newton's Third Law (Law of Action-Reaction) is also known as...

a)

The Law of Inertia

b)

The Law of Acceleration

c)

The Law of Force Pairs

127.

The car is driving down the street. What object in this picture creates the force that pushes the car forward?

a)

The engine

b)

The wheels

c)

The exhaust

d)

The ground

128.

You and your friend are both wearing roller skates. You push your friend. What might happen?

a)

Your friend moves back, but you don't.

b)

You move back, but your friend doesn't.

c)

You and your friend both move back.

d)

Neither of you move back.

129.

You kick a soccer ball. What is true about the force on you and the ball?

a)

The force on the ball is bigger.

b)

The force on you is bigger.

c)

Both forces are the same.

130.

The Moon's gravity pulls on the Earth and the Earth's pulls on the Moon. Which force is stronger?

a)

The Earth's pull is stronger.

b)

The Moon's pull is stronger.

c)

The two forces are the same.

131.

A small car and a large car get into an accident. The small car is much more seriously damaged than the large car. Why might this happen?

a)

The big car has more mass, so it exerts a larger force than the small car.

b)

The big car has a larger acceleration than the smaller car, so it stays safe.

c)

The forces are the same, so the lower mass car has a larger acceleration, causing more damage.

d)

Big cars are built with stronger materials compared to small cars.

132.

You throw a ball. Your hand creates a force on the ball, and the ball creates a force on your hand. Choose the correct answer:

a)

The force on the ball and your hand are equal.

b)

The force on the ball and your hand act in opposite directions.

c)

The force on the ball and your hand act at the same time.

d)

All of the above.

133.

Action: Cannon pushes on cannonball

a)

Reaction: Cannonball flies forward

b)

Reaction: Cannonball pushes back on cannon

c)

Reaction: Cannonball falls to the ground

d)

Reaction: Cannonball pushes into the air

134.

Action: Gravitational attraction pulls a book down

a)

Reaction: A surface or the ground pushes the book up

b)

Reaction: The book pulls back on the Earth

c)

Reaction: The book falls to the ground

d)

Reaction: The book pushes against a surface or the ground.

135.

Action: A swimmer pushes the water backwards

a)

Reaction: The swimmer moves forward

b)

Reaction: The water pushes the swimmer forward

c)

Reaction: The swimmer is tired

d)

Reaction: The water moves backward

136.

Action: Mrs. Scarborough pushes on the wall.

a)

Reaction: The wall pushes Mrs. Scarborough back.

b)

Reaction: The wall moves.

c)

Reaction: A friction force with the ground keeps Mrs. Scarborough in place.

d)

Reaction: The wall absorbs her force.

137.

Action: A baseball player throws a ball.

a)

Reaction: The ball flies through the air.

b)

Reaction: The ball pushes back on the player's hand.

c)

Reaction: The ball falls to the ground.

d)

Reaction: The ball pushes on the air.

138.

A force can be exerted by one object on itself.

a)

True

b)

False

139.

What is the reaction force when a person jumps up?

a)

The person pushes on the ground.

b)

The ground pushes the person up.

c)

The person moves upwards.

d)

The person moves downwards.

140.

What will happen when a person jumps off of a canoe?

a)

The canoe will continue in the same direction as it was moving before.

b)

The canoe will remain stationary.

c)

The canoe will move in the direction of the person jumping.

d)

The canoe will move backwards from the direction of the jump.

141.

What are the correct action and reaction forces for walking?

a)

Action: The person pushes against the floor. Reaction: The floor pushes the person.

b)

Action: The person moves forwards. Reaction: The person pushes against the floor.

c)

Action: A person applies friction backwards.

Reaction: The friction pushes the person forwards.

d)

Action: A person pushes against the floor. Reaction: The person moves forwards.

142.

What is the correct reaction force for a hammer hitting a nail?

a)

The nail goes into the wood.

b)

The nail pushes back on the hammer.

c)

The hammer pushes on the person.

d)

The nail pushes back on the person.

143.

Action: A bowling ball rolls into a bowling pin.

a)

Reaction: The pin falls over.

b)

Reaction: The pin pushes back on the ball.

c)

Reaction: The ball rolls into the wall.

d)

Reaction: The pin pushes against the floor.

144.
Which represents the acceleration of the ball?
a)
A
b)
B
c)
C
d)
D
145.
Which of the following depict the speed of the blowing ball?
a)
A
b)
B
c)
C
d)
D
146.
A horse gallops around a circular arena.  The centripetal force on the horse is ___.
a)
directed outward
b)
tension
c)
directed toward the center of the arena
d)
9.8 N
147.
What relationship exists between the radius of a circle and the centripetal acceleration?
a)
direct
b)
inverse
c)
exponential
d)
inverse squared
148.
Which of the following units is used for tangential velocity?
a)
m/s2
b)
N
c)
J
d)
m/s
149.
Which of the following is the unit for centripetal force?
a)
J
b)
m/s2
c)
kg⋅m/s
d)
N
150.
What is the relationship between centripetal force and the mass of an object?
a)
direct
b)
inverse
c)
exponential
d)
inverse squared
151.
Which of the following increase the centripetal force?
a)
Increasing the radius
b)
Increasing the velocity
c)
Decreasing the mass
d)
Decreasing the acceleration
152.
A car with mass m travels around a curve with velocity v. What do you know about the centripetal force if the velocity triples?
a)
Nothing 
b)
The centripetal force triples
c)
the centripetal force multiplies by 9
d)
The centripetal force divides by 3
153.
A car with mass m travels around a curve with velocity v. What do you know about the centripetal force if the radius triples?
a)
9.8?
b)
Force triples
c)
Force divides by 3
d)
Force divides by 9
154.
Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long.
a)
.38
b)
1.23
c)
.55
d)
1.66 N
155.

A car is doing donuts in a parking lot. It completes 5 circles in 35 seconds. What is the period of rotation, in seconds?

156.

A pig is flying in uniform circles with a period of 2 seconds. How many circles does the pig complete over ten seconds?

157.

A object is traveling in uniform circular motion. It has a period of 6 seconds. The radius of the circle is 3 meters. What is the tangential velocity, in m/s?

(round to a whole number)

158.

When dealing with circular motion, the time that it takes to make one revolution of the circle is called the:

a)

rotation.

b)

orbit.

c)

period.

d)

segment.

159.

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

a)

because it ir changing speed

b)

because it is changing direction

c)

because it is moving n a straight line

d)

because it has mass

160.

An object in uniform circular motion is always moving ________________ the circle.

a)

away from

b)

toward

c)

parallel to

d)

tangent to

161.

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

162.

Neglecting air resistance, how would the horizontal acceleration and velocity of the hammer change if the thrower releases the chain?

a)

The horizontal acceleration and velocity of the hammer would be along the Vtang vector.

b)

The horizontal acceleration and velocity of the hammer would be inward toward the thrower.

c)

The horizontal acceleration and velocity of the hammer would be straight down by gravity.

d)

The horizontal acceleration and velocity of the hammer would be continue in a circle.

163.

A car moves with a constant speed of 17 m/s on a circular track of 200 m radius. Calculate the acceleration of the vehicle. HINT: a = V2 / R

a)

1.45 m/s2

b)

0.76 m/s2

c)

1.98 m/s2

d)

2.34 m/s2

164.

A 250 kg motorcycle goes around a 20.0 m radius turn at 19.0 m/s. What is the centripetal force on the motorcycle? HINT: f = MV2 / R

a)

2396.6 N

b)

4512.5 N

c)

5006.8 N

d)

5656.7 N

165.

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

166.

A ball was swung at constant speed in a horizontal circle on the top of a level lab table. Which of the following was the direction of the acceleration on the ball?

a)

The acceleration was inward along the radius of the circle.

b)

The acceleration was outward along the radius of the circle.

c)

The acceleration was tangent to the circle in the direction of the ball's motion.

d)

D.The acceleration was perpendicular to both the ball's motion and the tabletop.

167.

What is “Centripetal Force”?

a)

Centripetal Force is a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.

b)

Centripetal Force is the resistance to motion of one object moving relative to another.

c)

Centripetal Force are attractive or repulsive forces between particles that are caused by their electric charges.

d)

Centripetal Force is the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface.

168.

In this diagram, what do the red arrows represent?

a)

the acceleration vector

b)

the velocity vector

c)

the centripetal force vector

d)

the force of gravity

169.
Centripetal acceleration always points
a)
in the direction of the object's motion
b)
in the opposite direction of the object's motion
c)
towards the center of the circle
d)
towards the outside of the circle
170.
Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?
a)
0.25 ms-2
b)
0.5 ms-2
c)
1 ms-2
d)
2 ms-2
171.
What is the direction of the velocity at point B, if the ball is revolving clockwise?
a)
up
b)
right
c)
down
d)
left
172.

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

a)

5 m/s2

b)

17.63 m/s2

c)

10 m/s2

d)

8.81 m/s2

173.
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
174.

The drum of a washing machine rotates 1800 times in 3 minutes. What is the period?

a)

0.1 s

b)

0.2 s

c)

0.3 s

d)

0.5 s

175.
Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long.
a)
.38
b)
1.23
c)
.55
d)
1.66 N
176.

A car is rounding a bend as shown in the diagram. Which arrow correctly shows the direction of the cars velocity?

a)

A

b)

B

c)

C

d)

D

177.

In the diagram of the car, if the driver took his hands off the steering wheel, which arrow correctly shows the direction the car would travel in?

a)

A

b)

B

c)

C

d)

D

178.
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
179.
A test car moves at a constant speed around a circular track.  If the car is 48.2 m from the track's center and has a centripetal acceleration of 8.05 m/s2, what is the car's tangential speed?
a)
19.7 m/s
b)
5.99 m/s
c)
0.17 m/s
d)
388.01 m/s
180.
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
181.

A 22.0 kg child is riding a playground merry-go-round that is rotating at 40.0 rev/min. What centripetal force must she exert to stay on if she is 1.25 m from its center?

a)

120 N

b)

240 N

c)

480 N

d)

960 N

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11th - 12th Grade