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Newton's Laws and Forces Review

Total questions: 67

Worksheet time: 1hrs 19mins

Name
Class
Date
1.
If a net force is acting on an object, 
a)
its velocity must be constant
b)
its velocity must be changing
c)
its mass must be changing
d)
its acceleration = 0 
2.
A person on a stationary skateboard throws a bowling ball with a velocity of 5.0 m/s. What is a possible speed of the person after the throw? 
a)
0 m/s
b)
1.5 m/s
c)
5.0  m/s
d)
7.5 m/s
3.
The recoil speed of a rifle is much less than the exit velocity of a bullet because...
a)
the rifle experiences a smaller force
b)
the rifle experiences a smaller change in momentum
c)
the rifle has a much greater mass
d)
the rifle does not obey the laws of physics
4.

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...

a)

Skater 1 experiences a greater change in momentum

b)

Skater 2 experiences a greater change in momentum

c)

Skater 1 has a greater speed than Skater 2

d)

Skater 1 experiences a greater force

5.
Both students experience the same ____
a)
force of impact
b)
time of impact
c)
change in momentum
d)
all of the above
6.
What law is best described by inertia?
a)
1st
b)
2nd
c)
3rd
7.
Object at rest stays at rest.
a)
1st
b)
2nd
c)
3rd
8.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
9.
A 20 kg bike accelerates at 10 m/s2.  what was the force?
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
10.
If net force acting on object is 0, then the force is considered to be..
a)
Balanced
b)
Unbalanced
c)
Equal in Direction
d)
Distance/Time
11.
A car speeding up, a dog slowing down and person turning around the block are examples of..
a)
Balanced Forces
b)
Unbalanced Forces
12.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
zero net force
c)
balanced forces
d)
unbalanced forces
13.
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 
14.
Newton's third law states that any action will have a(n) _______ and ______ reaction
a)
Equal and similar
b)
Equal and opposite
c)
Equal and different
d)
Greater and opposite
15.
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
d)
None of these
16.
When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?
a)
The cannon moving forward
b)
The cannonball moving forward
c)
The cannon moving backward
d)
The cannonball moving backward
17.
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
18.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
19.
Name the missing force...
a)
spring force
b)
weight force
c)
normal force
d)
buoyant force
20.
Name the missing force...
a)
applied force
b)
weight force
c)
lift
d)
normal 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?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
25.
Is it BALANCED? 
a)
Yes
b)
No
26.
Which one is balanced?
a)
top
b)
bottom
c)
both
27.

What forces are on a leopard laying on a log?

a)

Fgrav & Fapp

b)

Fair & Fgrav

c)

Fgrav & FNorm

d)

Ffric & FNorm

28.

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

a)

gravity

b)

normal

c)

a push or pull

d)

friction

29.

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

a)

up

b)

down

c)

left

d)

right

30.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

31.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
32.
Which of the following never changes no matter where in the universe?
a)
weight
b)
force
c)
mass
d)
pounds
33.
If Earth's mass was cut in half, what would happen to your mass?
a)
increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, mass is not affected by gravitational force
34.
What is the definition of "weight"?
a)
measure of the force of gravity on your body
b)
the time it takes to get on a ride 
c)
the amount of matter in an object
d)
the size of an object
35.
The weight of an object _________ as it moves away from the center of Earth.
a)
increases
b)
stays the same
c)
triples
d)
decreases
36.
The mass of an object ___________ as it moves away from the center of Earth
a)
stays the same
b)
decreases
c)
increases
d)
doubles
37.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
38.
What best describes the mass and weight of a person as they move around the universe?
a)
mass and weight changes
b)
Mass and weight stays constant
c)
weight remains constant, mass changes
d)
Mass stays constant, weight changes
39.
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
40.
The force of gravity on Jupiter is a little more than 2 times the gravitational force on Earth. If an object has a mass of 50 kg and a weight of 490 N on Earth, what would be the object's approximate mass and weight on Jupiter?
a)
50 kg and 490 N
b)
100 kg and 490 N
c)
50 kg and 980 N
d)
100 kg and 980 N
41.
If an object mass =30 Kg on the Earth, what would be it's weight on Earth?
a)
30 N
b)
300 kg
c)
3000N
d)
300 N
42.

You have a ball with a weight of 76N. What is the mass of the ball?

a)

78N

b)

78kg

c)

7.8kg

d)

7.8N

43.

Find the weight of a 5kg rock on Mercury with a gravitational pull of 3.59m/s/s.

a)

5kg

b)

17.95N

c)

1.39N

d)

0.718N

44.

Find the mass of a 5kg rock on Mercury with a gravitational pull of 3.59m/s2.

a)

5kg

b)

17.95N

c)

1.39N

d)

0.718N

45.

What unit do scientists use to measure force?

a)

Grams

b)

Newton

c)

Meters

d)

Joule

46.

Which force pulls downward on objects?

a)

Normal force

b)

Friction force

c)

Gravity

d)

Air resistance

47.

What force is needed to accelerate 60 kg object at 2 m/s2?

(a)  

48.

A force of 200 N pushes an object at 8 m/s2. What is the mass of the object?

(a)  

49.

If an object has a mass of 50 kg, determine its weight on Earth. (Earth's gravity = 9.8 m/s2)

(a)  

50.
Which of the following will not change in different gravitational fields?
a)
weight
b)
force
c)
mass
d)
pounds
51.

The force of gravity (mass x gravity) is also known as...

a)

mass

b)

weight

c)

distance

d)

acceleration

52.

Earth's gravity, 9.8 m/s2, is considered a/an...

a)

force

b)

weight

c)

acceleration

d)

mass

53.

Calculate the net force for the diagram.

a)

800 N down unbalanced

b)

600N down balanced

c)

400 N down unbalanced

d)

400 N up unbalanced

54.

When two force act in the same direction, how would you calculate the net force?

a)

Subtract the forces

b)

Balance the forces

c)

Add the forces

d)

Divide the forces.

55.

What is the net force for the following scenario. 100 N going left and 25 N going right.

a)

125N

b)

75N

c)

75N left unbalanced

d)

75N left balanced

56.

A water skier with a mass of 72 kg was being pulled by a boat that caused him to accelerate at 3 m/s2. Calculate the force of the boat pulling on the water skier.

a)

4 N

b)

216 N

c)

24 N

d)

218 N

57.

A car with a mass of 1500 kg speeds up from 20 m/s to 26 m/s in 2 seconds. Calculate the force the engine had to exert to change the cars speed. (hint: you might need your acceleration formula as well as your force formula)

a)

4500 N

b)

30,000 N

c)

39,000 N

d)

3,000 N

58.

A force of 50 N is needed to accelerate a toy car 2 m/s2. Calculate the mass of the toy car.

a)

50 kg

b)

75 kg

c)

100 kg

d)

25 kg

59.

A person has a mass of 27 kg. They are being pulled in a wagon with a net force of 6 N. What is the acceleration of the person?

a)

15 m/s2

b)

8 m/s2

c)

.22 m/s2

d)

12 m/s2

60.

What is the equation for Force?

a)

velocity x motion

b)

mass x acceleration

c)

kilograms x mass

d)

meters / seconds

61.

The combination of all forces are called

a)

balanced forces

b)

total force

c)

net forces

62.

When forces are equal from both sides, this is called...

a)

unbalanced force

b)

balanced force

c)

gravity

d)

acceleration

63.

What are the two factors that affect the force of gravity?

a)

distance and time

b)

mass and speed

c)

mass and distance

64.

What is Newton's FIRST law?

a)

An object that is a rest will remain at rest, and an object in motion will stay in motion unless an outside force acts upon it

b)

If a force increases, so will mass and acceleration. If mass or acceleration decrease, so will force.

c)

For every action, there is an equal and opposite reaction

65.

What is Newton's SECOND law?

a)

For every action there is an equal and opposite reaction

b)

If force increases, so will mass and acceleration. If mass or acceleration decrease, so will force.

c)

An object at rest will remain at rest, and an object in motion will stay in motion unless an outside force acts upon it.

66.

What is Newton's THIRD law?

a)

For every action, there is an equal and opposite reaction

b)

An object at rest will remain at rest, and an object in motion will stay in motion unless an outside force acts upon it.

c)

If force increases, so will mass and acceleration. If mass or acceleration decrease, so will force.

67.
What is the net force and the direction of movement?
a)
50 Newtons, Left
b)
50 Newtons, Right
c)
500 Newtons, RIght
d)
450 Newtons, LEft

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