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Unit 8 Review

Total questions: 80

Worksheet time: 2hrs 37mins

Name
Class
Date
1.
What is the net force
a)
10 N
b)
0 N
c)
25 N
d)
1 N
2.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
3.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
4.

What force should be applied to compress a spring by x=0.013 meters if its spring constant is k = 1900 N/m?

a)

1880 N

b)

24.7 N

c)

1900 N

d)

0.127 N

5.
What is the definition of "weight"?
a)
the force in which gravity pulls on an object
b)
the time it takes to get on a ride 
c)
the amount of matter in an object
d)
the size of an object
6.
Describe how your mass would change if you went to the moon?
a)
a) Increase
b)
b) Decrease
c)
c) Be zero
d)
d) Remain the same
7.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
8.
The scientific unit for mass is
a)
Kg
b)
N
c)
pounds
d)
ounces
9.

If an object's mass is 30 Kg on the Earth, what would be it's weight on Earth?

a)

29 N

b)

294 kg

c)

2940 N

d)

294 N

10.

The weight of a boulder on Neptune is 2,960 Newtons. The boulder has a mass of 269 kilograms. What is the acceleration due to gravity on Neptune?

a)

3.7 m/s/s

b)

8.9 m/s/s

c)

2.04 x 106 m/s/s

d)

11 m/s/s

11.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
12.
A hockey puck slides on ice at a constant velocity. What is the net force acting on the puck?
a)
Zero
b)
Equal to its weight
c)
Less than its weight but greater than zero
d)
Depends on the speed of the puck
13.

What is the coefficient of static friction if it takes 44 N of force to move an 86-N box on a horizontal surface?

a)

0.78

b)

0.51

c)

0.78 N

d)

0.58 N

14.

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

a)
b)
c)
d)
15.

In physics, a push or a pull is called...

a)

Mass

b)

Weight

c)

Force

d)

Energy

16.

What happens when two forces act in the same direction?

a)

you subtract them

b)

You add them together

c)

Nothing

d)

Cancel each other out

17.

When two equal forces act on the same object in opposite

directions, the net force is _______________.

a)

Positive

b)

Negative

c)

Zero

d)

Unbalanced

18.

The force that pulls falling objects toward Earth is called

a)

Gravity

b)

Inertia

c)

Centripetal Force

d)

Velocity

19.

What is Newton’s Second law?

a)

P=mv

b)

F=ma

c)

S=D/T

d)

D= S/T

20.

Which law states that for every action there is an equal but

opposite reaction?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

Law of Conservation of Mass

21.

If an action force is a cue ball (white) hitting a billiard ball

(various colors) when playing pool, then the reaction force is

a)

The Billiard ball on the Pool stick

b)

Billiard ball on the cue ball

c)

Cue ball on the pool stick

d)

Pool stick on the cue ball

22.

A bird has a mass of 6 kg and accelerates at a rate of 7 m/s².

Find the net force. (Do not forget your units)

a)

40 Kg* M/S

b)

40 N

c)

42 N

d)

42 kg*M/S

23.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

24.
Who wins the tug of war with what net force?
a)
The person on the left with 20 N
b)
The person on the left with 80 N
c)
The people on the right with 20 N
d)
The people on the right with 100 N
25.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
26.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

27.
If these teams are pulling with the same amount of force what will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
28.
Balanced or unbalanced?
a)
balanced
b)
unbalanced
29.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

30.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
31.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
32.
Calculate the net force of the object.
a)
10N
b)
2N
c)
15N
d)
5N
33.
You and your friend are playing tug of war. Your friend pulls with a force of 55 N to the right. You pull with a force of 65 N to the left. What is the net force on the rope?
a)
10 N left
b)
20 N
c)
10 N left
d)
10 N right
34.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
35.

In physics, a push or a pull is called...

a)

Mass

b)

Weight

c)

Force

d)

Energy

36.

What happens when two forces act in the same direction?

a)

you subtract them

b)

You add them together

c)

Nothing

d)

Cancel each other out

37.

Example of an equal force is...

a)

Tug of War Game that nobody wins

b)

Tug of war game that the right side wins

c)

Airplane crashing down

d)

Boat sinking down

38.

When two equal forces act on the same object in opposite

directions, the net force is _______________.

a)

Positive

b)

Negative

c)

Zero

d)

Unbalanced

39.

The force that one surface exerts on another when the two

rub against each other is called

a)

Inertia

b)

Acceleration

c)

Friction

d)

Mass

40.

The force that pulls falling objects toward Earth is called

a)

Gravity

b)

Inertia

c)

Centripetal Force

d)

Velocity

41.

The force of gravity on a person or object at the surface of a

planet is known as

a)

Gravity

b)

Mass

c)

Weight

d)

Height

42.

What is Newton’s Second law?

a)

P=mv

b)

F=ma

c)

S=D/T

d)

D= S/T

43.

Which law states that for every action there is an equal but

opposite reaction?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

Law of Conservation of Mass

44.

The product of an object’s mass and velocity is called its

a)

Momentum

b)

Inertia

c)

Speed

d)

Acceleration

45.

The momentum of an object is in the same direction as its

a)

Speed

b)

Velocity

c)

Inertia

d)

Acceleration

46.

How much momentum does a 25 kg mass moving at 15 m/s

have?

a)

375 Kg* m/s

b)

375 N

c)

375 m/s^2

d)

375 m/s

47.

What is the Law of Conversation of Momentum

a)

For every action there is an equal and opposite reaction

b)

The resistance to the change in motion

c)

The objects have the same momentum before and after they collide

d)

Matter cannot be created or destroyed

48.

A crumpled piece of paper hits the ground before a flat sheet of paper because?

a)

More air resistance on the flat sheet of paper

b)

Drag

c)

Inertia is different for each object

d)

momentum is different for each object

49.
The force of gravity will _____________as objects become farther apart.
a)
decrease
b)
increase
50.
When forces are acting on an object and it produces a net force of 0, you can say that the forces are _______________.
a)
balanced
b)
unbalanced
51.
Issac Newton's First Law of Motion states that...
a)
Objects in motion remain in motion.
b)
Force equals mass times acceleration.
c)
Every action has an equal and opposite reaction.
d)
Speed equals distance divided by time.
52.
The force of the Earth, moon or other large body that attracts other objects towards it is called________.
a)
friction
b)
electricity
c)
gravity
d)
speed
53.
Two factors that affect the rate of gravity are ____________.
a)
distance and mass
b)
weight and resistance
c)
location and speed
d)
position and friction
54.
Newton's 3rd Law of Motion states...
a)
Every action has an equal and opposite reaction.
b)
Force equals mass times acceleration.
c)
Objects in motion stay in motion.
d)
Speed equals distance over time.
55.
Velocity is an object's ________________.
a)
speed in a specific direction
b)
distance traveled in a certain amount of time
c)
unit of force measurement
d)
change in speed or direction
56.
Force is measured in _____________.
a)
pounds
b)
newtons
c)
grams
d)
meters
57.
Newton's 2nd Law of Motion states...
a)
Force equals mass times acceleration.
b)
Objects in motion stay in motion unless acted upon by an outside force.
c)
Every action has an equal and opposite reaction.
d)
All objects are required to have a gravitational force.
58.

Luis is trying to push a box of new soccer balls across the floor. In the illustration, the arrow on the box is a vector representing the force that Luis exerts.

If the box is not moving, which of the following must be true?

a)

The box is exerting a larger force on Luis than he is exerting on the box.

b)

There is another force acting on the box that balances Luis’s force

c)

Luis is applying a force that acts at a distance

d)

There is no force of friction acting on the box.

59.

Measuring acceleration requires appropriate units. Scientists measure acceleration using a standardized set of units that are part of the SI system. Which are the SI units for acceleration?

a)

N

b)

m/s

c)

m/s 2

d)

kg·m/s

60.
Both of these are measured in Newtons
a)
Force and acceleration
b)
Force and weight
c)
Mass and weight
d)
Mass and acceleration
61.
The acceleration due to Earth's gravity is ...
a)
9.8 m/s2
b)
29.4 m/s2
c)
1.6 m/s2
d)
32 m/s2
62.

Julio and Luis need to move a box that contains a 35 N TV. Julio pushes with 250 N, and Luis pushes with 100 N. If both boys are pushing in the same direction (and assuming no friction), what is the net force?

a)

250 N

b)

350 N

c)

135 N

d)

150 N

63.

An object has a mass of 2 kg on Earth. What will happen to its mass and weight on the moon, which has less gravity?

a)

The mass will change, but the weight will remain constant.

b)

The mass will stay constant, but the weight will change.

c)

The mass and weight will both remain constant.

d)

The mass and weight will both change.

64.

Last-minute Louis frantically tried to finish his homework while his mom drove him to school. He placed his book on his lap and was reaching for a pencil when his mom suddenly slammed on the brakes. Although Louis stayed buckled in his seat, his book flew forward and crashed into the front windshield. Which of the following was most responsible for the book flying forward?

a)

displacement

b)

friction

c)

inertia

d)

gravity

65.
Angela blows air into a balloon and holds the end of it closed with her fingers. When she lets go of the end of the balloon, Angela observes that the release of the air propels the balloon.  The propelling of the balloon from the release of the air is an example of which of Newton’s laws? 
a)
The force of an object is the product of its mass multiplied by its acceleration. 
b)
 A force of attraction exists between any two objects with mass. 
c)
 For every action, there is an equal and opposite reaction.
d)
An object in motion tends to stay in motion unless an unbalanced force acts upon it. 
66.

A heavy suitcase is on the floor in a bus station. The following forces are acting on the suitcase:

A force of 2 newtons (N) pushing it to the right.

A force of 5 newtons (N) pushing it to the left.

The force of gravity pulling it down toward the floor.

The force of the floor pushing up on it. Which statement best identifies the result of all the forces acting on the suitcase?

a)

The suitcase moves to the left.

b)

The suitcase moves downward.

c)

The suitcase moves to the right.

d)

The suitcase does not move at all.

67.

What law is best described

a)

1st

b)

2nd

c)

3rd

d)

law of motion

68.
It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes
a)
Newton's first law, the law of inertia
b)
Newton's second law, the law of acceleration
c)
Newton's third law, the law of action reaction 
d)
The law of universal gravitation
69.
A person would weigh more on Jupiter than on the Earth because . . .
a)
Jupiter has more mass, and therefore more gravity
b)
Jupiter has less mass, and therefore more gravity
c)
Jupiter has more mass, and therefore less gravity
d)
Jupiter has less mass and therefore less gravity
70.
When only the force of gravity is acting on an object, we say that the object is in ___________________________.
a)
Terminal Velocity
b)
Free Fall
c)
Projectile motion
d)
Centripetal Force
71.
What force causes objects falling near Earth's surface to slow down?
a)
Gravity
b)
Air Resistance
c)
Centripetal Force
d)
Newtons
72.
If a bowling ball and a feather were dropped at the same time, in a room with no air resistance (vacuum), which object will hit the ground first?
a)
Bowling Ball
b)
Feather
c)
Both would hit at the same time
d)
Neither one would hit the ground because air is what pushing things down.
73.

Which of the objects below will fall at the fastest rate when dropped? Assume there is no air resistance.

a)

25 kg rock

b)

75 kg rock

c)

50 kg rock

d)

They all fall at the same rate

74.

If the net force on an object is not equal to zero, the object:

a)

is at rest

b)

is moving at a constant velocity

c)

is accelerating

d)

is at terminal velocity

75.

The net force on this object is

a)

3 N right

b)

3 N left

c)

9 N right

d)

9 N left

76.

According to Newton's __________ law of motion, an object with less mass will experience a greater acceleration if a constant force is applied to the object.

a)

1st

b)

2nd

c)

3rd

d)

4th

77.

What is the net force on the object?

a)

9 N right

b)

9 N left

c)

5 N right

d)

5 N left

78.

What is true about the rate of acceleration caused by gravity?

a)

It is = 9.8 m/s/s

b)

It is noted as g.

c)

It is constant all over Earth.

d)

All statements are true.

79.

Weight

a)

is the amount of matter in an object

b)

is the force from gravity on an object

c)

would have the same value on different planets

d)

is measured in kg

80.

A boulder in the park has a mass of 10 kg. What is the weight of the boulder?

a)

10 kg

b)

9.8 N

c)

98 N

d)

10 N

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