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Unit 4 Test Bank

Total questions: 137

Worksheet time: 6hrs 0mins

Name
Class
Date
1.

According to Newton's first law of motion, an object at rest will remain at rest and an object in motion will continue in motion with constant velocity, unless acted upon by a ________.

a)

force

b)

acceleration

c)

friction

d)

gravity

2.

What is the other name for Newton's first law of motion?

a)

law of motion

b)

law of inertia

c)

law of gravity

d)

law of acceleration

3.

According to Newton's second law of motion, the acceleration of an object is directly proportional to the ________ applied to it and inversely proportional to its ________.

a)

force, mass

b)

speed, acceleration

c)

velocity, time

d)

distance, time

4.

What is the formula for Newton's second law of motion?

a)

F = mv

b)

F = ma

c)

F = ma^2

d)

F = m/a

5.

According to Newton's third law of motion, for every action, there is an equal and opposite ________.

a)

energy

b)

motion

c)

force

d)

reaction

6.

What is the other name for Newton's third law of motion?

a)

law of inertia

b)

law of action and reaction

c)

law of conservation of momentum

d)

law of motion

7.

What is a free body diagram?

a)

A free body diagram is a visual representation of the forces acting on an object.

b)

A free body diagram is a tool used to measure the weight of an object.

c)

A free body diagram is a mathematical equation that describes the forces on an object.

d)

A free body diagram is a graph showing the motion of an object.

8.

In a free body diagram, what do arrows represent?

a)

Mass

b)

Velocity

c)

Energy

d)

Forces

9.

What is the net force acting on an object in equilibrium?

a)

zero

b)

positive

c)

negative

d)

unknown

10.

What is the net force acting on an object in motion?

a)

The net force is the difference between the largest and smallest forces.

b)

The net force is the average of all the individual forces.

c)

The net force is the vector sum of all the individual forces.

d)

The net force is the result of adding all the forces together.

11.

What is the net force acting on an object at rest?

a)

zero

b)

negative

c)

positive

d)

undefined

12.

What is the unit of force?

a)

Newton

b)

Second

c)

Meter

d)

Kilogram

13.

What is the symbol for force?

a)

T

b)

S

c)

A

d)

F

14.

What is the SI unit of mass?

a)

pound

b)

liter

c)

gram

d)

kilogram

15.

What is the symbol for mass?

a)

m

b)

l

c)

g

d)

kg

16.

What is inertia?

a)

the force that opposes motion

b)

the force of attraction between 2 objects

c)

an object's tendency to stay in its state of motion

d)

a change in an object's speed and/or direction

17.

Which of the objects listed below have the greatest inertia?

a)

A 500 kg object that is not moving.

b)

A 300 kg object that is not moving on the Moon.

c)

A 250 kg object moving at 25 m/s.

d)

A 700 kg object moving at 3 m/s.

18.

Which of the following forces acts against the motion of an object? (NOTE: there are two correct answers to this question.)

a)

Air resistance (Drag)

b)

Normal force

c)

Imaginary Force

d)

Friction force

e)

Magnitude

19.
Name the missing force...
a)
buoyant force
b)
normal force
c)
weight force
d)
frictional force
20.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
21.
Name the missing force...
a)
tension force
b)
frictional force
c)
normal force
d)
spring force
22.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
23.
Name the missing force...
a)
weight force
b)
normal force
c)
applied force
d)
frictional force
24.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

25.

The net forces on this object are pushing or pulling in these directions: (pick all that are correct)

a)

up

b)

down

c)

left

d)

right

26.

Determine the force at G:

a)

30 N

b)

20 N

c)

50 N

d)

0 N

27.
Calculate the net force acting upon the object.
a)
10 N north
b)
10 N south
c)
14.1 N east
d)
0 N
28.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

29.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
30.
Match description with free-body diagram.
a)
A book is at rest on a tabletop.
b)
A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling. Diagram the forces acting on the combination of gymnast and bar.
c)
An egg is free-falling from a nest in a tree. Neglect air resistance.
d)
A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance.
31.

What is Newton's First Law?

a)

The restoring force of a spring is proportional to the displacement of the spring

b)

An object in motion will stay in motion unless acted on by an external force

c)

F = ma

d)

For every force, there's a force equal in magnitude but opposite in direction.

32.

What is Newton's Second Law

a)

F = -kx

b)

F = ma

c)

F = mg

d)

F = mad

33.

What is Newton's Third Law?

a)

The restoring force of a spring is proportional to the displacement of the spring

b)

An object in motion will stay in motion unless acted on by an external force

c)

Object's have a tendency to resist changes in their motion

d)

For every force, there's a force equal in magnitude but opposite in direction.

34.

What is the weight of a person whose mass is 75 kg?

a)

736 N

b)

84.8 N

c)

750 N

d)

368 N

35.

Based on the free-body diagram, which statement is true?

a)

The object is moving to the left

b)

The object is accelerating to the right

c)

The object is accelerating to the left

d)

The object is moving to the right

36.

Block of cheese, B, has a mass of 0.5 kg and the wheel of cheese, W, has a mass of 0.4 kg. What is the tension in rope 1? Assume the acceleration is 0 m/s2

a)

4.91 N

b)

8.83 N

c)

3.92 N

d)

0.981 N

37.

Based on this free-body diagram, which statement can you be sure is true?

a)

This object is not moving

b)

This object is moving to the right

c)

This object is accelerating to the left

d)

This object is accelerating to the right

38.

Which equation is Hooke's Law?

a)

F = ma

b)

F = -kx

c)

F = mg

d)

F = -k / x

39.

You place 16 N worth of bananas on the scale at the store. The scale drops 4 cm once it stops moving. What is the spring constant of this scale?

a)

100 N/cm

b)

300 N/m

c)

400 N/m

d)

400 N/cm

40.

Hooke's Law states that the restoring force is (a)   to the displacement of the spring.

41.
A spring has a spring constant of 330 N/m.  How far is the spring compressed if 150 N of force are used?
a)
2.2 m
b)
0.0014 m
c)
5.0 m
d)
0.45 m
42.
The tendency of an object to resist changes in its motion is...
a)
inertia
b)
force
c)
acceleration
d)
velocity
43.
The force that opposes motion between two surfaces in contact with each other.
a)
inertia
b)
friction
c)
momentum
d)
gravity
44.
The combination of all the forces acting on an object is the...
a)
net force
b)
action force
c)
reaction force
d)
balance force
45.
A stiff material has a:
a)
high spring constant
b)
low spring constant
c)
spring constant of any value
d)
spring constant which is difficult to predict
46.

When determining the NET force on an object you should (TWO correct answers)

a)

subtract forces in opposite directions

b)

add forces in the same direction

c)

divide by velocity

d)

multiply by acceleration

47.

While you are driving, a kid runs into the street. If your car has a mass of 900 kg and there's a net braking force of 2700 N, what is the acceleration?

a)

3 m/s2

b)

1800 m/s2

c)

12 m/s2

d)

900 m/s2

48.
Name the missing force...
a)
weight force
b)
normal force
c)
applied force
d)
frictional force
49.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
50.
Name the missing force...
a)
push
b)
weight force
c)
tension force
d)
drag
51.

A leftward force is applied to a crate to push it across the floor at a constant speed. Which is the correct force diagram?

a)
b)
c)
d)
52.

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor.

a)
b)
c)
d)
53.

A downward-moving skydiver who has just opened the parachute is slowing down.

a)
b)
c)
d)
54.
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
55.
Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
56.
The change in velocity in a given time period is?
a)
Vi
b)
Vf
c)
a
d)
d
57.
Which would fall with greater acceleration in a vacuum—a leaf or a stone?
a)
the leaf
b)
the stone
c)
They would accelerate at the same rate.
d)
It is difficult to determine without more information.
58.

What is the Net Force and the direction of the object's movement as a result of the net force?

a)

5N, Right

b)

5N, Left

c)

9N, Right

d)

9N, Left

59.

What is the Net Force and the direction of the object's movement as a result of the net force?

a)

9N, Right

b)

9N, Left

c)

3N, Right

d)

3N, Left

60.

What is the Net Force and the direction of the object's movement as a result of the net force?

a)

11N, Right

b)

11N, Left

c)

1N, Left

d)

1N, Right

61.

If the net force (Fnet) is 0, _____

a)

the forces are balanced.

b)

All of these are correct!

c)

the object maintains its same speed and direction.

d)

the object maintains its velocity.

e)

the object does not speed up, slow down, or turn.

62.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
63.
Name the missing force...
a)
spring force
b)
weight force
c)
normal force
d)
buoyant force
64.
Name the missing force...
a)
applied force
b)
weight force
c)
lift
d)
normal force
65.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
66.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

67.

An object resting on a surface experiences +980 N of Normal force. What is the mass of the object?


W=mg

a)

-98 kg

b)

9.8 kg

c)

100 kg

d)

-100 kg

68.
Calculate the net force acting upon the object.
a)
10 N north
b)
10 N south
c)
14.1 N east
d)
0 N
69.

Determine the force at G:

a)

30 N

b)

20 N

c)

50 N

d)

0 N

70.

What can you tell about the forces on F and H?

a)

They must be unbalanced.

b)

They are negative.

c)

They must be the same.

d)

They are equal to the net force.

71.
What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 
a)
0.78
b)
0.51
c)
0.78 N
d)
0.58 N
72.
What are the units on the coefficient of friction?
a)
none
b)
Newtons
c)
meters
d)
kilograms
73.
A box takes 40 N to start moving when the coefficient of static friction is .54. What is the weight of the box? 
a)
81 N
b)
18 N
c)
98 N
d)
74 N
74.
The force that acts in the opposite direction of motion when two surfaces come in contact. 
a)
Force
b)
Friction
c)
Static
d)
Kinetic 
75.

The Coffee cup in the picture is resting on a table. What force(s) are missing from the free body diagram?

a)

No forces are missing

b)

The normal force from the table pushing the cup up.

c)

The normal force form the table pushing the cup down.

d)

The friction force from the table pushing the cup left and right.

76.

The coffee cup in the picture is at rest on the table. What is true about the Normal force?

a)

The normal force is exactly 15

b)

The normal force is less than 15

c)

The normal force is more than 15

d)

The normal force is -10

77.

The hockey puck is moving at a constant velocity across the ice. What forces does the puck experience at this moment?

a)

None

b)

Gravity

c)

Gravity and Normal

d)

Gravity, Normal, and Friction

e)

Gravity, Normal, Friction, and Applied

78.

The hockey puck is moving at a velocity of 20 m/s. If the forces on the puck are in equilibrium, what will the puck's velocity be 2 seconds later?

a)

0 m/s

b)

1 m/s

c)

2 m/s

d)

10 m/s

e)

20 m/s

79.

Which equation would accurately describe the forces on this cup of coffee?

a)

Fn − Fg = 0F_n\ -\ F_g\ =\ 0

b)

Fn×Fg = 0F_n\times F_g\ =\ 0

c)

Fn−10FgF_n-10F_g

d)

Fn−Fg = −10F_n-F_g\ =\ -10

80.

The forces on this chandelier are...

a)

Gravity

b)

Gravity and Normal

c)

Gravity and Tension

d)

Gravity, Tension, Friction, and Applied

81.

A chandelier is hanging from the ceiling. If the force of gravity on the chandelier is 120 N, the force of tension must be ...

a)

0 N

b)

12 N

c)

60 N

d)

120 N

82.

A squirrel sits on the ground and eats a donut. We know the forces on him must be balanced because...

a)

Forces are always balanced

b)

the squirrel is not accelerating

c)

squirrels are projectiles

d)

he's eating a donut

83.

A squirrel sits on the ground and eats a donut. If the ground pushes up on the squirrel with a force of 11 N, The squirrel and donut together weigh ...

a)

less than 11 N

b)

Exactly 11 N

c)

More than 11 N

84.

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

85.

The Car in the picture is moving to the right at a constant velocity. Any friction present would be pushing the car to the ...

a)

Up

b)

Right

c)

Down

d)

Left

86.

Two books rest on the same table. Book A weighs 20 N. Book B has a mass of 3 kg. Which one has a greater force of gravity on it?

a)

The same

b)

Book A

c)

Book B

87.

A man pushes a box across the floor at a constant velocity. There is a force on the box pulling it toward the center of the earth. This is called the

a)

force of gravity

b)

normal force

c)

friction force

d)

applied force

88.

A man pushes a box across the floor at a constant velocity. There is a force on the box from the floor pushing the box up. This is the ...

a)

force of gravity

b)

normal force

c)

force of friction

d)

applied force

89.

A man pushes a box across the floor at a constant velocity. There is a force on the box resisting its motion. This is the ...

a)

force of gravity

b)

normal force

c)

force of friction

d)

applied force

90.

A man pushes a box across the floor at a constant velocity. There is a force from the man pushing on the box. This is the ...

a)

force of gravity

b)

normal force

c)

force of friction

d)

applied force

91.

A man pushes a box across the floor at a constant velocity. There is a force on the box pulling it toward the center of the earth. This is called the

a)

force of gravity

b)

normal force

c)

force of friction

d)

applied force

92.

A man pushes a box across the floor at a constant velocity. Which formula describes the horizontal forces on the box?

a)

FP − Ff = 0F_P\ -\ F_f\ =\ 0

b)

Fp+Fg − Ff = 0F_p+F_g\ -\ F_f\ =\ 0

c)

FP −10Fg = 0F_P\ -10F_g\ =\ 0

d)

Fp ×Ff=0F_{p\ }\times F_f=0

93.

A man pushes a box across the floor at a constant velocity. Which formula describes the vertical forces on the box?

a)

FP − Fg = 0F_P\ -\ F_g\ =\ 0

b)

Fp+Fg − Ff = 0F_p+F_g\ -\ F_f\ =\ 0

c)

Fn −10Fg = 0F_n\ -10F_g\ =\ 0

d)

Fn−mg = 0F_n-mg\ =\ 0

94.

A man pushes a box across the floor at a constant velocity. If another box were put on top of this box, what would happen to the force of friction?

a)

It would increase

b)

It would decrease

c)

It would remain unchanged

95.
 What is the unit called that measures force?
a)
weight
b)
meter
c)
Newton
d)
kilogram
96.
What does friction produce?
a)
light
b)
sound
c)
heat
d)
gravity
97.
The force that acts in the opposite direction of motion when two surfaces come in contact. 
a)
Force
b)
Friction
c)
Static
d)
Kinetic 
98.
What direction does friction act relative to motion?
a)
in the same direction
b)
in the opposite direction 
c)
need more information
d)
depends on the force
99.
 What is the force of friction between a block of ice that weighs 950 N and the ground if μ = .12? 
a)
65 N
b)
226 N
c)
175 N
d)
114 N
100.
What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 
a)
0.78
b)
0.51
c)
0.78 N
d)
0.58 N
101.
A box takes 40 N to start moving when the coefficient of static friction is .54. What is the weight of the box? 
a)
81 N
b)
18 N
c)
98 N
d)
74 N
102.
What are the units on the coefficient of friction?
a)
none
b)
Newtons
c)
meters
d)
kilograms
103.
What are the units on the force due to friction?
a)
none
b)
Newtons
c)
meters
d)
kilograms
104.
What is the coefficient of static friction for steel on steel?
a)
0.57
b)
0.74
c)
0.42
d)
0.53
105.

The force that opposes motion because of resistance between bodies in contact

a)

Tension

b)

Applied

c)

Friction

d)

Spring

106.

The force you get when a material like a rope or string is being

     stretched

a)

Friction

b)

Gravity

c)

Tension

d)

Normal

107.

The force that enables compasses to work

a)

Friction

b)

Compression

c)

Tension

d)

Magnetism

108.

The force you get when an object moves

    through air

a)

Gravity

b)

Nuclear

c)

Air resistance

d)

Electrostatic

109.

The force that exists between all objects

     with mass

a)

Gravity

b)

Nuclear

c)

Air resstance

d)

Electrostatics

110.

The sum of all forces acting on an object and direction is called the

a)

Balanced Force

b)

Net Force

c)

Unbalanced Force

d)

Contact Force

111.

Are the forces balanced or unbalanced?

a)

Balanced

b)

Unbalanced

112.

Forces have both ________ and direction.

a)

Magnitude

b)

Velocity

c)

Gravity

d)

Acceleration

113.

Name the missing force.

a)

Gravitational Force

b)

Normal Force

c)

Friction Force

d)

Applied Force

114.

Name the missing force.

a)

Normal Force

b)

Push/Pull Force

c)

Friction Force

d)

Tension Force

115.

Name the missing force.

a)

Gravitational Force

b)

Normal Force

c)

Tension Force

d)

Friction Force

116.

This diagram can be used to indicate which of the following? Select ALL that apply.

a)

An object at rest

b)

An object speeding up

c)

An object slowing down

d)

An object moving at a constant velocity (speed)

e)

An object with constant acceleration

117.

A leftward force is applied to a crate to push it across the floor at a constant speed. Which is the correct force diagram?

a)
b)
c)
d)
118.

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor.

a)
b)
c)
d)
119.
What does this graph represent?
a)
Constant Speed
b)
Acceleration
c)
Not moving
120.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
121.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
122.

Which graph BEST represents the motion of an object that was initially at rest and is accelerating uniformly?

a)
b)
c)
d)
123.
What is the net force?
a)
30 N 
b)
25 N 
c)
5 N 
d)
55 N 
124.
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
125.

What is the extension of the spring?

a)

4 cm

b)

7 cm

c)

3 cm

d)

11 cm

126.

The spring constant of an object tells you?

a)

What type of spring you are dealing with

b)

How long the spring will stretch or compress

c)

It gives you a value on how easy or hard it is to change the objects length.

d)

A spring constant gives you a number which tells you what material the spring is made of.

127.
A spring has a spring constant of 330 N/m.  How far is the spring compressed if 150 N of force are used?
a)
2.2 m
b)
0.0014 m
c)
5.0 m
d)
0.45 m
128.
What Quantity can you calculate from the graph and give the magnitude of that quantity.  
a)
distance 4.5 m
b)
Force 15 N
c)
spring constant 20 N/m
d)
spring constant 200 N/m
129.
A spring has a spring constant of 330 N/m.  How far is the spring compressed if 150 N of force are used?
a)
2.2 m
b)
0.0014 m
c)
5.0 m
d)
0.45 m
130.
What force should be applied to compress a spring by 0.013 m if its spring constant is k = 1900 N/m?
a)
1880 N
b)
24.7 N
c)
1900 N
d)
0.127 N
131.
If F is force, k is spring constant and x is extension, Hooke's Law tells us that:
a)
F=k/x
b)
x=Fk
c)
k=Fx
d)
F=kx
132.
A force of F=500 N is applied to extend a spring.  What is the displacement x of the spring if its spring constant is k= 540 N/m?
a)
0.96 m
b)
0.93 M
c)
1.3 m
d)
1.1 m
133.
Which of the following is a true statement regarding springs?
a)
The higher the value of the spring constant, the stiffer the spring.  
b)
In Hooke's law, the force exerted by the spring acts in the same direction as displacement.  
c)
Springs are designed to provide unpredictable variations in force.  
d)
The force exerted by a spring has a quadratic relationship with the displacement form equilibrium.  
134.

For two or more springs with spring laid in SERIES, the resulting spring constant k is given as:

a)

1k=1k1+1k2+...\frac{1}{k}=\frac{1}{k_1}+\frac{1}{k_2}+...  

b)

k=k1+k2+...k=k_1+k_2+...  

c)

k=1k1+1k2+...k=\frac{1}{k_1}+\frac{1}{k_2}+...  

d)

1k=k1+k2+...\frac{1}{k}=k_1+k_2+...  

135.

For two or more springs in PARALLEL, the resulting spring constant is given as:

a)

1k=1k1+1k2+...\frac{1}{k}=\frac{1}{k_1}+\frac{1}{k_2}+...  

b)

k=k1+k2+...k=k_1+k_2+...  

c)

k=1k1+1k2+...k=\frac{1}{k_1}+\frac{1}{k_2}+...  

d)

1k=k1+k2+...\frac{1}{k}=k_1+k_2+...  

136.

Which collection of springs has the largest spring constant?

a)

A

b)

B

c)

C

d)

D

e)

E

137.

A single spring is stretched by x when a mass m is attached. An identical spring is joined in parallel to the first spring. How much will the two springs stretch when a mass m is attached to both springs simultaneously? (Assume the springs have negligible mass)

a)

The spring will stretch by 2x since each spring stretches by x

b)

The spring will stretch by x since the spring constant remains the same

c)

The spring will stretch by 0.5x since there are 2 springs holding the mass m

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