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Newton's Laws of Motion & Force

Total questions: 70

Worksheet time: 2hrs 15mins

Name
Class
Date
1.
According to Newton’s laws, for any object, the greater the force that's applied to it, the greater its____ will be.
a)
acceleration
b)
inertia
c)
size
2.
The size of the gravitational force between two objects depends on their ____.
a)
frictional forces
b)
inertia
c)
masses and the distance between them
3.
An astronaut is planning a trip to a newly-discovered planet. According to the Law of Universal Gravitation, the astronaut's weight on the new planet will be greater than his weight on Earth if:
a)
the new planet has the same gravity as Earth.
b)
the new planet has more gravity than Earth.
c)
the gravity of the planet doesn't matter. Weight is the same everywhere in the universe.
4.
The relationship among mass, force, and acceleration is explained by ____.
a)
Law of Conservation of Momentum
b)
Newton's 2nd Law of Motion
c)
Newton's 3rd Law of Motion
5.
"To every action there is an equal and opposite reaction" describes which law?
a)
Newton's 3rd Law of Motion
b)
Law of Conservation of Momentum
c)
Newton's 1st Law of Motion
6.
Calculate the force on an object that has a mass of 10 kg and an acceleration of 4 m/s^2
a)
40 N
b)
8 N
c)
2.5 N
7.
A 500 N force is applied to a 25 m/s^2 object. The mass of the object is ____.
a)
12,500 kg
b)
20 kg
8.
The ____ of an object does not change, but its _____ can, based on its location.
a)
mass, weight
b)
weight, mass
9.
A group of students is playing tug-of-war. The students on both sides of the rope are pulling with equal force so that the rope is not moving. This is an example of
a)
unbalanced forces
b)
balanced forces
c)
acceleration
10.
A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. What is the most likely cause of this?
a)
Since the hose is at rest, it tends to stay at rest.
b)
The force exerted on the water equals the mass of the water times its acceleration.
c)
The escaping water exerts an equal and opposite force on the hose.
11.
If the same force is applied to each of the balls pictured below, which one will have the LEAST acceleration?
a)
a. Golf ball
b)
b. Tennis ball
c)
c. Baseball
d)
d. Bowling ball
12.
Which of the following is measured in Newtons?
a)
weight
b)
mass
c)
momentum
13.
The upward force on an object falling through the air is ____.
a)
air resistance
b)
gravity
c)
inertia
14.
When two forces on the same object are equal and opposite, these forces are called _____ forces.
a)
net
b)
balanced
c)
unbalanced
15.
What is the ACCELERATION of the box in the picture?
a)
25 m/s^2
b)
12 m/s^2
16.
What is the WEIGHT of the box in the picture?
a)
25 N
b)
245 N
17.
As the mass of an object increases, its inertia will ________.
a)
increase
b)
decrease
c)
stay the same
18.
Which two quantities are measured in the same units?
a)
velocity and acceleration
b)
weight and force
c)
mass and weight
19.
A student drops a feather and rock at the same time from Mrs. Taylor’s window. If air resistance wasn’t a factor, what should she observe?
a)
The rock falls slower than the feather.
b)
The rock falls faster than the feather.
c)
The rock and feather fall at the same rate.
20.
A man weighing 800 N is standing on a chair. In order to support the man, what FORCE is the chair exerting?
a)
800 N up
b)
800 N down
21.
An object that is falling freely has a constant what?
a)
speed
b)
velocity
c)
acceleration
22.
What is the NET FORCE on the block?
a)
8 N left
b)
2 N left
c)
2 N right
23.
If the block in the picture has an acceleration of 1 m/s^2, what would be the block's MASS?
a)
8 kg
b)
2 kg
c)
0.5 kg
24.
Which of the following best describes how a swimmer moves through the water?
a)
The swimmer pushes backwards on the water and the water pushes with an equal but opposite force back on the swimmer.
b)
The swimmer pushes off the side of the pool and his inertia keeps him moving through the water.
25.
In the picture, if the card were quickly pulled off the cup like the arrow suggests, what property would explain why the coin falls into the cup rather than moving with the card?
a)
friction
b)
force
c)
inertia
26.
Momentum describes
a)
How much force is needed to change an objects motion
b)
How much velocity changes in a given amount of time
c)
The tendency of an object to resist a change in motion
d)
The balanced forces on a falling object with a constant speed
27.
Consider a watermelon that starts from rest and drops straight down from a tall building. Air resistance can be ignored. Which statement about the watermelon’s motion is FALSE?
a)
The watermelon falls at a constant velocity
b)
The watermelon has a positive acceleration
c)
The watermelon speeds up as it falls.
d)
The watermelon’s acceleration due to gravity is 9.8 m/s^2.
28.
What is the weight (in Newtons) of a person with a mass of 95 kg?
a)
9.7 N
b)
95 N
c)
104.8 N
d)
931 N
29.
Which shopping cart will have more acceleration?  
a)
The empty shopping cart
b)
The shopping cart that's full
c)
They will be the same
30.

This is Newton's 2nd law

a)

True

b)

False

31.

What is the gravitational force acting on a 50 kg object on Earth?

a)

490 N

b)

50 N

c)

9.8 N

d)

500 N

32.

If a car accelerates at 3 m/s^2 and has a mass of 1000 kg, what is the net force applied to the car?

a)

3000 N

b)

1000 N

c)

333 N

d)

30 N

33.

Which of the following statements is true about inertia?

a)

Inertia is the tendency of an object to resist changes in its state of motion.

b)

Inertia is the force that keeps objects moving in a straight line.

c)

Inertia is the energy required to change an object's motion.

d)

Inertia is the gravitational pull on an object.

34.

If a force of 10 N is applied to a 5 kg object, what is the acceleration of the object?

a)

2 m/s^2

b)

5 m/s^2

c)

10 m/s^2

35.

Which of the following statements is true about gravitational force?

a)

Gravitational force is stronger on objects with less mass.

b)

Gravitational force acts only on objects in motion.

c)

Gravitational force acts between any two masses in the universe.

36.

Which of the following is a unit of force?

a)

Kilogram

b)

Meter per second squared

c)

Newton

d)

Joule

37.
Which one is balanced?
a)
top
b)
bottom
c)
both
d)
neither
38.

True or False:

Your mass on Earth is the same on the Moon.

a)

True

b)

False

39.
_______ force is needed to move objects of larger mass.
a)
Less
b)
Equal
c)
More
d)
Light
40.
The force that pulls objects down towards the center of the Earth.
a)
Friction
b)
Gravity
c)
Air Resistance
d)
Wind Resistance
41.
This force is caused by objects rubbing together.
a)
Gravity
b)
Air Resistance
c)
Friction
d)
Spinning
42.
A rocket launches because of ______.
a)
its large mass
b)
an opposite reaction
c)
gravity
d)
air resistance
43.
______________ forces do not affect the movement of an object.
a)
Strong
b)
Weak
c)
Light
d)
Balanced
44.
This force is caused by air and slows things down.
a)
Friction
b)
Air Resistance
c)
Gravity
d)
Pulling
45.

Which of the following has less inertia?

a)

Feather

b)

Hammer

46.

Which of the following has more inertia?

a)

Bowling ball

b)

Tennis ball

47.

What is inertia?

a)

The resistance of any physical object to any change in its state of motion

b)

The amount of mass an object has

c)

A reaction in an object

d)

No one knows

48.

A lamp sitting on a table is demonstrating Newton's ___ Law.

a)

1st

b)

2nd

c)

3rd

d)

4th

49.
A 20 kg bike accelerates at 10 m/s2.  what was the net force
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
50.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
51.
If an action force is a cue ball (white) hitting a billiard ball (various colors) when playing pool, then the reaction force is
a)
exerted on the table
b)
exerted on all the other billiard balls.
c)
not present
d)
exerted by the billiard ball on the cue ball.
52.
If Brandon wants the  baseball to go far, he must use _________ force when he swings the bat.
a)
no
b)
equal
c)
less
d)
more
53.
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
54.
What is the difference between mass and weight?
a)
mass is how much matter is in an object, and weight is the gravitational pull on that object
b)
mass and weight are the same
c)
weight affects how much mass is in an object
d)
weight is determined by how many atoms make up an object
55.

A fireman turns on his hose and is knocked backwards is an example of...

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

Newton's 4rth Law

56.

What is the net force on a box sitting on the ground?

a)

0

b)

Gravity

c)

Friction

d)

Tension force

57.
Why is it harder for the boy in Image B to get down the hill?
a)
Motion
b)
Friction
c)
Work
d)
Displacement
58.
Are forces balanced or unbalanced when a marble speeds up rolling down a ramp?
a)
Balanced
b)
Unbalanced
59.

Momentum is expressed with the letter

a)

m

b)

t

c)

p

d)

v

60.

The equation for momentum is

a)

m = mv

b)

F = ma

c)

p = mv

d)

m = pv

61.

Which of the following are the correct units for momentum?

a)

N

b)

kg m/s2

c)

m/s

d)

kg m/s

62.

A 4 kg mass is traveling as 0.5 m/s. What is its momentum?

a)

2 kg m/s

b)

4 kg m/s

c)

6 kg m/s

d)

8 kg m/s

63.

An object traveling at 40 m/s has a momentum of 120 kg m/s. What is its mass?

a)

4800 kg

b)

3 kg

c)

0.33 kg

d)

0 kg

64.
Which of the following never changes no matter where in the universe?
a)
weight
b)
force
c)
mass
d)
pounds
65.
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
66.

What is the net force (direction and magnitude) acting on the box?

a)

30N, right

b)

30N, left

c)

5N, left

d)

25N, left

67.

What is the net force (direction and magnitude) acting on the box?

a)

100N, left

b)

90N, right

c)

100N, right

d)

140N, right

68.
a)

5N

b)

1N

69.

Which of the following is closest in value to the gravitational field strength, g, on Earth?

a)

0.98 m/s2

b)

9.8 m/s2

c)

98.0 m/s2

d)

980 m/s2

70.

What is the weight of a 0.456 kg object? (g = 9.8 m/s2)

a)

457 g

b)

0.457 kg

c)

4.57 N

d)

457 N

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