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PS Unit 7 Forces

Total questions: 97

Worksheet time: 3hrs 24mins

Name
Class
Date
1.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
2.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

3.

A ____________ is a push or a pull on an object.

a)

friction

b)

force

c)

magnet

d)

gravity

4.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
5.
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.
6.
Balanced or unbalanced?
a)
balanced
b)
unbalanced
7.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

8.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
9.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
10.
Balanced or Unbalanced?
a)
Balanced 
b)
Unbalanced
11.
A push or pull that causes a change in motion
a)
Friction
b)
Gravity
c)
Force
d)
Mass
12.
When forces are _________ the object DOES NOT move.
a)
unbalanced
b)
balanced
c)
heavy
d)
light
13.
What is the net force of an object that is not moving?
a)
0 N
b)
100 N
c)
Upward force
d)
10 N
14.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
15.
Calculate the Net Force. 
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
16.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 n right
d)
50 N left
17.
Which could be an example of an unbalanced force?
a)
A plate sitting on a dining table
b)
A ball at the top of a hill that is not moving
c)
Earth orbiting the Sun 
d)
A baseball that has been thrown to home plate.
18.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
19.

Which example would be a balanced force?

a)

Train moving at a constant speed in the same direction.

b)

A skier going down a hill.

c)

A basketball being passed to a teammate.

d)

An apple falling to the floor.

20.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
21.
45 m/s2 is the... 
a)
Mass
b)
Force 
c)
Acceleration
d)
weight
22.
If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)
a)
The one with a mass of .78 kg will have the greatest acceleration.
b)
The one with a mass of .52 kg will have the greatest acceleration.
c)
They will both accelerate at the same rate.
23.
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
24.
Unit of mass
a)
m/s 2
b)
m/s
c)
newtons
d)
kg
25.
A student pushes a box to right with a force of 10N while a young boy pushes the box to the left with a force of 8N. What is the sum of all forces on the box? 
a)
18N left
b)
18N right
c)
2N right
d)
2N left
26.
A cat sitting on couch, a pencil on desk and a car at rest are all example of..
a)
Balanced Force
b)
Unbalanced Force
27.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
28.
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 
29.
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
30.
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
31.
Which of Newton's laws is illustrated when a magician pulls a tablecloth out from under the dishes without disturbing them?
a)
first
b)
second
c)
third 
d)
fourth
32.
A person is pushed forward into their seat belt when a car stops.  Which law is this?
a)
1st
b)
 2nd
c)
2 and 3
d)
3rd 
33.
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
34.
A bike accelerates at 10 m/s2 when a force of 50N is applied.  What is the mass of the bike and its rider?
a)
25 kg
b)
200 kg
c)
20 kg
d)
5 kg
35.
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
36.
Which of Newton's Laws is illustrated with a large mass and a small mass accelerating?
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
37.
A change in an object's position is called ______.
a)
Speed
b)
Motion
c)
Velocity
d)
Friction
38.
If an external force is applied, the velocity will change because of the force.
a)
True
b)
False
39.
The tendency of an object to resist change in motion.
a)
Force
b)
Motion
c)
Friction
d)
Inertia
40.
Objects with more mass or heavier have LESS inertia.
a)
True
b)
False
41.
Lighter objects have LESSER inertia than heavier objects.
a)
True
b)
False
42.
____ is a force that occurs when an object rubs against another object.
a)
Motion
b)
Friction
c)
Velocity
d)
Speed
43.
Friction can make a moving object slow down or stop.
a)
True
b)
False
44.
An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
a)
Newton's First Law of Motion
b)
Newton's Second Law of Motion
c)
Newton's Third Law of Motion
d)
Newton's Fourth Law of Motion
45.
Objects with more mass (or heavier) have more inertia; thus,  EASIER to move or stop.
a)
True
b)
False
46.
Objects with more mass (or heavier) have greater gravitational pull.
a)
True
b)
False
47.
What is the equation for Newton's 2nd law?
a)
a = bc
b)
F = m/a
c)
F = ma
d)
a = b/c
48.
When mass is 10 kg, acceleration is 2 m/s/s, what is force?
F = ma
a)
5 N
b)
20 N
c)
8 N
d)
12 N
49.
The larger the mass you have the _____ force you need to change its motion.
a)
more
b)
less
50.
As force applied to a textbook increases, what happens to its acceleration?
a)
Stays the same
b)
Increases
c)
Decreases
d)
Opens
51.
After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals
a)
twice the force with which it was fired
b)
the same amount of force with which it was fired
c)
1/2 the force with which it was fired
d)
zero, since no force is requires to keep it moving. 
52.
True or False.  An increase in mass will result in an increase in the acceleration?
a)
True
b)
False
53.
Which of the following best describes Newton's 1st law?
a)
Objects keep doing what they are doing unless a force is applied
b)
Objects react to outside forces
c)
Unbalanced forces on an object keep it at rest
d)
More mass = more inertia
54.
The force of a cart doubles.  What happens to the cart's acceleration?
a)
It doubles
b)
It quadruples 
c)
It halves
d)
It quarters
55.
A force of 90N is applied to each cart below, which one will accelerate the fastest?
a)
Cart 1
b)
Cart 2
c)
Cart 3 
d)
Cart 4
56.
Two students are in a baseball game. The first student hits a ball very hard and it has a greater acceleration than the second student who bunts the ball lightly.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
57.
My cat eyeballs the christmas tree and decides to apply all of his mass directly to the center of the tree. This force causes the tree to accelerate down towards the ground.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
58.
A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
59.
If you increase the mass on an object, its acceleration
a)
decreases
b)
stays the same
c)
also increases
d)
stops
60.

Newton’s law states that for every action, there is an ________ reaction.

a)

unequal and opposite

b)

equal and similar

c)

stronger and opposite

d)

equal and opposite

61.

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

a)

False

b)

True

62.

When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

a)

The cannon moving forward

b)

The cannon moving backwards

c)

The cannonball moving backwards

d)

The cannonball moving forward

63.

Action reaction forces never cancel each other out because

a)

They act on different objects.

b)

They act on the same objects

c)

They do not act on objects.

64.

How is this an example of Newton’s Third law?

a)

Only the ball is using the head

b)

They are both exerting an equal force on each other

c)

Only the head is pushing the ball

65.

If two people with the same mass collide, they experience the same amount of force.

a)

True

b)

False

66.

Action-reaction pairs can cause a change in motion.

a)

True

b)

False

67.

When the person pushes the ground with their foot, the equal and opposite reaction force is

a)

the ground pushing back on their foot

b)

when they start to move forward

68.

Force always come in________

a)

waves

b)

triplets

c)

pairs

69.

When a heavy football player and a light one run into each other, who exerts more force

a)

The light one

b)

Their force are equal

c)

The heavy one

70.

The forces in a force pair are in _______ direction

a)

opposite

b)

same

71.
A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?
a)
For every action there is an equal and opposite reaction.
b)
Every mass exerts a force on every other mass.
c)
An object at rest tends to stay at rest.
d)
Friction opposes the motion of an object.
72.

What happens to the balloon if the air is released ?

a)

Balloon goes right

b)

Balloon goes up

c)

Balloon goes down

d)

Balloon goes left

73.

The two paired forces in Newton's third law:

a)

act on different objects

b)

are equal in size

c)

are opposite in direction

d)

are the same type

e)

all of the above

74.
If there are two forces going in the same direction how would you find the net force?
a)
Subtract
b)
Add
c)
Neither
d)
Multiply
75.
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
76.
Find the net force: 15 N to the right, and another 15 newtons to the right.
a)
0 N Right
b)
0 N Left
c)
30 N Left
d)
30 N Right
77.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
78.
The force that pulls things toward earth.
a)
Speed
b)
Gravity
79.
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
80.
A measure of how much matter an object has is--
a)
weight
b)
gravity
c)
mass
d)
volume
81.
The weight of an object _________ as it moves away from the center of Earth.
a)
increases
b)
stays the same
c)
triples
d)
decreases
82.
The mass of an object ___________ as it moves away from the center of Earth
a)
stays the same
b)
decreases
c)
increases
d)
doubles
83.
As an object's mass increases, its gravitational pull will ____________.
a)
decrease
b)
increase
c)
stay the same
d)
get weaker
84.
Any object with mass has gravity.
a)
True
b)
Sometimes
c)
False
d)
Never
85.
In physics, mass is measured in _____.
a)
grams
b)
newtons
c)
kilograms
d)
pounds
86.
In physics, weight is measured in _____.
a)
grams
b)
newtons
c)
kilograms
d)
pounds
87.
In physics, the weight equation is _____________.
a)
Weight=Mass×Gravity
b)
Mass=Weight×Gravity
c)
Gravity=Mass×Weight
88.
You get in your spaceship and head on a trip to Pluto.  As you leave Earth, your weight ______________.
a)
increases
b)
decreases
c)
remains the same
89.
An object weighs 340 N.  What is its mass?
a)
340 kg
b)
340 N
c)
34 kg
d)
34 N
90.
If an object's mass =30 Kg on the Earth, what would be it's weight on Earth?
a)
3 kg
b)
300 kg
c)
3 N
d)
300 N
91.

A feather and a bowling ball drop at the same rate on the moon (meaning they will hit the ground at the same time). Why is this?

a)

Voodoo Magic

b)

There is no air resistance on the moon (so no air friction)

c)

The force of gravity is less on the moon

d)

The force of gravity is greater on the moon

92.

Which Object would have the greatest inertia?

a)

A Feather

b)

A Ford Prius

c)

A Military Tank

d)

A Shoe

93.

What would weigh more, a 20 N sack of Bricks, or a 20 N sack of feathers?

a)

The sack of bricks

b)

The sack of feathers

c)

They are equal in weight

94.

Weight is best described as

a)

An objects resistance to acceleration

b)

What causes an object to fall

c)

The downward force exerted on a mass due to gravity

d)

A force solely dependent on an objects mass

95.

Why is the acceleration due to gravity greater on Jupiter, than earth?

a)

Because Jupiter has a bigger radius than earth

b)

Because Jupiter is a gas giant

c)

Because Jupiter has a greater density than earth

d)

Because Jupiter has more mass than earth

96.

What is the weight of a 15 kg object on earth? (Use g= 9.8 m/s2)

a)

147 N

b)

.65 N

c)

1.53 N

d)

207 N

97.

Match the following

a)

Air resistance

1.

An applied force of air on an object.

b)

Friction

2.

An applied force of a surface on an obj.

c)

Gravity (Weight)

3.

An app. force of one object on another.

d)

Applied

4.

Any force acting on an object.

e)

Net

5.

All applied forces added together.

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