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Forces Unit Review

Total questions: 93

Worksheet time: 23hrs 15mins

Name
Class
Date
1.
Newton’s first law of motion is also called the law of ________?
a)
Mass
b)
Inertia
c)
Force
d)
Velocity
2.
Slamming on the brakes in a moving car makes a passenger move forward against his or her seat belt because
a)
the passenger has the inertia to keep moving forward
b)
the passenger is being pushed by the seats of the car
c)
the passenger is better able to stop themselves in this manner
d)
the passenger has an equal and opposite force supporting their weight
3.
How long will an object remain at rest, according to Newton's First Law of Motion?
a)
it can't rest
b)
until noon
c)
until an unbalanced force occurs
d)
as long as there are unbalanced forces acting on it 
4.
For every _______ there is an equal and opposite ________. 
a)
reaction, action
b)
action, action
c)
reaction, reaction
d)
action, reaction
5.
Which of these is an example of Newton's First Law, inertia?
a)
pushing against a brick wall, and the brick wall does not move
b)
pushing against a stationary wheelbarrow, and the wheelbarrow accelerates forward
c)
pushing a wheelbarrow full of bricks, and the bricks slide back toward the handles
d)
pushing a wagon to the top of a hill, and the wagon to the top of hill and the wagon accelerates down the hill without assistance
6.
You are sitting in a car that isn't moving; the car accelerates. Your body is pushed back. Explain. 
a)
newtons
b)
vector
c)
inertia
d)
gravity
7.
Why is it harder to push a van filled with bowling balls than it is to push a van with basketballs?
a)
The mass of the car is greater than the mass of the basketballs
b)
The mass of the bowling balls is greater than the mass of the basketballs
c)
The van with the basketballs is bigger than the van with the bowling balls
d)
It should be equally as hard to push the two vans
8.
You are holding a bowl of hot soup while standing in the kitchen. As you begin to move, the soup spills out of the bowl. Upon reflection you realize that
a)
the soup spilled because of air resistance
b)
if you had traveled faster this wouldn't have happened
c)
the soup wanted to stay where it was, but you moved the bowl
d)
the soup and the bowl act as one body with the same velocity
9.
Which of these is an example of Newton's Second Law, F=ma
a)
a tug of war where both sides pull equally, and the rope doesn't move
b)
a wide receiver using his hands to stop and catch a football thrown by the quarterback
c)

a car traveling on a straight part of the highway with a cruise control set at constant velocity

d)
a book pushing down on the desk where it is resting
10.
Why do you lean towards the left when a car turns right
a)
because of inertia
b)
because of gravity
c)
because of buoyancy
d)
because of velocity
11.
You pull a wagon with your younger sister in it. Which of these would accelerate the rate at which you can pull the wagon?
a)
pull the wagon with less force
b)
Pull the wagon with more force
c)
Have your sister push down on the wagon
d)
Put another of your siblings in the wagon
12.
A wheelbarrow is experiencing two forces. One is pushing 5N east and another 5N west. What is true about the motion of the wheelbarrow?
a)
it isn't moving
b)
it is accelerating
c)
it is slowing down
d)
its speed is constant
13.
A 260.5N unbalanced force applied to push a chair across the room causing an acceleration of 4.2 m/s2. What is the mass of the chair?
a)
62.02 kg
b)
63.69 kg
c)
263.3 kg
d)
1123.5 kg
14.
When a person jumps horizontally off the end of a boat, the person goes forward and the boat goes backward. This is an example of 
a)
inertia
b)
action and reaction
c)
Newton's 1st law
d)
Newton's 2nd law
15.
A cup of coffee sits on the dashboard of an automobile. The car goes around a sharp curve. Even though you hold the cup still, coffee splashes out. This is explained due to 
a)
density
b)
friction
c)
gravity
d)
inertia 
16.
When a Civil War era cannon is fired, the force of the gas produced by exploding powder propels the cannonball forward at a high speed. According to Newton's 3rd law
a)
the cannon itself moves backward
b)
the cannon itself does not move due to inertia
c)
the cannon itself moves forward as well with the momenturm
d)
the cannon itself moves forward with the inertia of the cannonball
17.
When you push a boat off from the dock, you are demonstrating Newton's 3rd Law of Motion. It simply states that for every action there is an equal and opposite _______________?
a)
Motion
b)
Change
c)
Reaction
d)
Push
18.
The resultant force on the box is 
a)
2 Newtons to the left
b)
10 Newtons to the right
c)
10 Newtons to the left
d)
20 Newtons to the right
19.

Name that law: Law of Inertia

a)

1st Law of Motion

b)

2nd Law of Motion

c)

3rd Law of Motion

d)

Law of Universal Gravitation

20.

Name that law: If you use the same force to push a truck and push a car, the car will accelerate more than the truck.

a)

1st Law of Motion

b)

2nd Law of Motion

c)

3rd Law of Motion

d)

Law of Universal Gravitation

21.

A rock climber pulls down on the wall (action force). What is the reaction force?

a)

The wall pushing down on the climber.

b)

The climber pushing up on the wall.

c)

The climber pulling down on the wall.

d)

The wall pushing up on the climber.

22.

A car is driving south and hits a tree. What is the direction of the reaction force?

a)

East

b)

West

c)

North

d)

South

23.

The English Scientist who developed three laws of motion was called:

a)

Sir Isaac Newman

b)

Sir Isaac Newton

c)

Albert Einstein

d)

Mr. Fig Newton

24.

Because of inertia, a resting object ________.

a)

will remain at rest

b)

will move at a constant speed

c)

will eventually move

d)

is unbalanced

25.

The first law of motion states that objects in motion will:

a)

stop

b)

accelerate

c)

stay in motion

d)

rest

26.

The first law of motion states that objects at rest will stay at rest unless acted upon by an unbalanced:

a)

motion

b)

force

c)

inertia

d)

acceleration

27.

Newton's second law of motion states that an unbalanced force is equal to mass times:

a)

acceleration

b)

force

c)

motion

d)

inertia

28.

Newton's third law of motion states that for every action there is:

a)

an opposite, but equal reaction.

b)

an opposite and equal reaction.

c)

a reaction.

29.

Name the law: An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

a)

The First Law of Motion

b)

The Second Law of Motion

c)

That other law... you know?

d)

The Third Law of Motion

30.

This is the vector sum of all the forces that act upon an object.

a)

Total Force

b)

Net Force

c)

Next Force

d)

May The Force is With You... Always

31.

This a unit of force that will accelerate one kilogram of mass one meter per second squared.

a)

Fig Newton

b)

Sir Issac Newton

c)

Gravity

d)

A Newton

32.

This is the force that resists motion.

a)

Fraction

b)

Friction

c)

Quark

d)

Gravity

33.

This is the amount of matter in volume.

a)

Volume

b)

Matter

c)

Mass

d)

Motion

34.

This is a force that causes a change in motion of an object.

a)

A changing force

b)

Gravity

c)

A balanced Force

d)

An unbalanced force

35.

This is the measurement of change in an object's velocity (speed).

a)

Work

b)

Gravity

c)

Force

d)

Acceleration

36.

This is a quantity that has both magnitude and direction.

a)

A Victor

b)

A Victoria

c)

A Vakter

d)

A Vector

37.

This law states that the greater the mass of an object, the more force it will take to accelerate the object.

a)

Newton's second Law of Motion

b)

Newton's first Law of Motion

c)

Newton's third Law of Motion

d)

Newton's Eleventeenth Law of Motion

38.

This is the measure of force.

a)

Miles Per Hour

b)

The force of pushing

c)

Newtons

d)

Grams

39.
A car speeding up, a dog slowing down and person turning around the block are examples of..
a)
Balanced Forces
b)
Unbalanced Forces
40.

This equation goes with which law?

a)

Newton's first law of motion

b)

Newton's second law of motion

c)

Newton's third law of motion

41.

A person is pushed forward into their seat belt when a car stops. Which law is this?

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

42.
Which of Newton's laws are illustrated with a rocket launch?
a)
1st Law, the Law of Inertia. 
b)
2nd Law, the Law of Acceleration.
c)
3rd Law, the Law of Action Reaction
d)
The Law of Conservation of Mass
43.

When the force on a car is doubled, the acceleration is doubled.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

44.

A skater pushes another skater forward, but the one pushing moves backwards.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

45.

The harder you hit a baseball, the faster it accelerates.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

46.

You push against a wall and the wall is pushing back on you.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

47.

You are carrying a lunch tray when you bump into the edge of a table. Although the tray did not tip, your milk falls off of the front of the tray.

a)

Newton's

1st

Law of Motion

b)

Newton's

2nd

Law of Motion

c)

Newton's

3rd

Law of Motion

48.

Which law best explains why more force must be applied to the bowling ball to make it accelerate at the same rate as the tennis ball.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

49.
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
50.
What law of motion does this picture represent?
a)
Newtons 1st law
b)
Newtons 4th law 
c)
Newtons 3rd law 
d)
Newtons 2nd law
51.

A sports car speeds up much faster than a dump truck when a traffic light turns from red to green. Which law is this?

a)

Law 1

b)

Law 2

c)

Law 3

52.

Newton's Third Law says that forces must always occur in _____.

a)

pairs

b)

groups of 20 or more

c)

individual circumstances

d)

friction

53.

What measurement is used to measure force?

a)

Newtons

b)

Kelvin

c)

Kilos

d)

Moles

54.

Categorize this situation based on the size of the scale reading, aka normal force ( FnormF_{norm}  )

a)

Fnorm > FgF_{norm\ _{ }}>\ F_g  

b)

Fnorm<FgF_{norm}<F_g  

c)

Fnorm=FgF_{norm}=F_g  

d)

Not enough info to conclude

55.

What is the frictional force on a 25-N object sliding along a horizontal surface at constant speed if the coefficient of kinetic friction is 0.40?

a)

10 N

b)

25 N

c)

4.0 N

d)

8.0 N

56.

A 50.0-N box rests on an inclined plane whose angle of inclination is 30.0 degrees. What is the normal force acting on the object?

a)

25 N

b)

32 N

c)

43 N

d)

50 N

57.

A 25-N box lies on top of a 50-N box. What is the normal force acting on the 50-N box?

a)

There is none.

b)

25 N

c)

50 N

d)

75 N

58.

A 65-N box rests on an a 40.0-degree inclined plane. What is the coefficient of static friction if the box were to experience pending motion at this angle?

a)

0.50

b)

0.64

c)

0.72

d)

0.83

59.

A 60-N box moves on a 65-degree inclined plane. If the coefficient of kinetic friction is 0.25, by how much is the box accelerated?

a)

7.8 m/s/s

b)

9.8 m/s/s

c)

3.2 m/s/s

d)

1.9 m/s/s

60.

Which of the following statement about friction is not true?

a)

Friction is always parallel to the contact surface.

b)

Friction is always opposite the direction of motion.

c)

Frictional force is inversely proportional to the normal force of the object.

d)

Friction depends on the types of surface in contact with each other

61.

Which is the unit for the coefficient of friction?

a)

newton

b)

N/m2

c)

N-m

d)

It is dimensionless.

62.

What is the normal force exerted by the ground on a 65-kg metal bar?

a)

65 N

b)

640 N

c)

-65 N

d)

-640 N

63.

Which explains why there is less force needed once a heavy object starts moving from an initial state of rest?

a)

The inertia of the object is now less than when it is at rest.

b)

The force exerted is now greater than the normal force.

c)

The parallel force is now greater than the weight of the object.

d)

The coefficient of kinetic friction is less than the coefficient of static friction.

64.

The normal force on an object is a consequence of which law?

a)

First Law of Motion

b)

Second Law of Motion

c)

Third Law of Motion

d)

Law of Universal Gravitation

65.
The larger the mass you have the _____ force you need to change its motion.
a)
more
b)
less
66.

(Use Fnet=ma), A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2?

a)

30 N

b)

13 N

c)

3.3 N

d)

0.3 N

67.

(Using Fnet=ma), What net force is required to accelerate a car at a rate of 2 m/s2 if the car has a mass of 3,000 kg?

a)

6,000 N

b)

1,500 N

c)

3,002 N

d)

2,998 N

68.

(Use Fnet=ma). What is the mass of a falling rock if it produces a force of 147 N? (Acceleration due to gravity = 9.8 m/s2)

a)

15 kg

b)

1,440.6 kg

c)

156.8 kg

d)

137.2 kg

69.

(Use Fnet=ma). What is the mass of a truck if it produces a force of 14,000 N while accelerating at a rate of 5 m/s2?

a)

2,800 kg

b)

0.0004 kg

c)

70,000 kg

d)

13,995 kg

70.

(Use Fnet=ma). What is the acceleration of a softball if it has a mass of 0.5 kg and hits the catcher's mitt with a force of 25 N?

a)

0.5 kg

b)

50 kg

c)

25.5 kg

d)

12.5 kg

71.

(Use Fnet=ma). Your parents' car has a mass of 2,000 kg. If your car produces a force of 5,000 N, at what rate will it accelerate?

a)

2.5 m/s2

b)

0.4 m/s2

c)

10,000,000 m/s2

d)

3,000 m/s2

72.

(Use Fnet=ma). Use the diagram to determine the net force, assume the object is accelerating at a rate of 2 m/s2 and determine the mass of the object.

a)

2 kg

b)

4 kg

c)

6 kg

d)

8 kg

73.

(Use Fnet=ma). Use the diagram to determine the net force, assume the object is accelerating at a rate of 3 m/s2, and determine the object's mass?

a)

3 kg

b)

5 kg

c)

60 kg

d)

75 kg

74.

8 N to the left and 4 N to the right.

(a) Find the net force.

(b) Is this balanced?

a)

(a) 12 N Right  

(b) No

b)

(a) 4 N Left  

(b) No

c)

(a) 12 N Right  

(b) Yes

d)

(a) 4 N Left  

(b) Yes

75.

If the force of the person in the yellow is pushing right with 30N, and the force of the person in blue is also pushing is 30N left, what is the net force?

a)

0N

b)

60N

c)

900N

d)

1N

76.
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
77.
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
78.

FN=100N, Ff=20N

a)

μ=5.0

b)

μ=0.2

c)

μ=1.2

d)

μ=0.1

79.
 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
80.
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
81.

A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50.What is the magnitude of the frictional force that acts on the block?

a)

5 N

b)

8 N

c)

2 N

d)

0 N

82.

There are 25N of friction that keep a 10kg brick moving at a constant rate. What is the coefficient of friction?

a)

0.25

b)

0.25N

c)

4

d)

4N

83.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

84.
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
85.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
86.
Name the missing force...
a)
weight force
b)
normal force
c)
applied force
d)
frictional force
87.

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

a)
b)
c)
d)
88.

Which freebody diagram best represents a desk being pushed across the classroom floor?

a)
b)
c)
d)
89.

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

a)

inertia

b)

momentum

c)

friction

d)

applied force

90.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

91.

What is the net force?

a)

3 N Right

b)

3 N Left

c)

17 N Right

d)

17 N Left

92.

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

93.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force

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