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Net Force, Balanced and Unbalanced Force

Total questions: 112

Worksheet time: 2hrs 35mins

Name
Class
Date
1.

The sum of all forces acting on an object and direction is called the

a)

Balanced Force

b)

Net Force

c)

Unbalanced Force

d)

Contact Force

2.

A push/pull exerted on an object is called

a)

Force

b)

Momentum

c)

Speed

d)

Net force

3.

Are the forces balanced or unbalanced?

a)

Balanced

b)

Unbalanced

4.

Forces have both ________ and direction.

a)

Magnitude

b)

Speed

c)

Gravity

d)

Height

5.

A Newton is a unit of ______.

a)

Acceleration

b)

Inertia

c)

Force

d)

Velocity

6.

Name the missing force.

a)

Gravitational Force

b)

Normal Force

c)

Friction Force

d)

Applied Force

7.

Name the missing force.

a)

Normal Force

b)

Push/Pull Force

c)

Friction Force

d)

Tension Force

8.

Name the missing force.

a)

Normal Force

b)

Friction Force

c)

Gravitational Force

d)

Push/Pull Force

9.

The force that keeps objects on top of surfaces instead of letting them sink into the surface is known as:

a)

Normal Force

b)

Gravitational Force

c)

Friction Force

d)

Air resistance

10.

This diagram can be used to indicate which of the following? (TWO correct answers)

a)

An object at rest

b)

An object accelerating

c)

An object decelerating

d)

an object moving at a constant velocity (speed)

e)

(Trick question -- there is only one correct answer)

11.

A leftward force is applied to a crate to push it across the floor at a constant speed. Which is the correct force diagram?

a)
b)
c)
d)
12.

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

a)
b)
c)
d)
13.
The sum of all forces acting on an object and direction
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
14.
Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?
a)
Balanced
b)
Unbalanced
15.

What is an Applied Force?

a)

The distance

b)

Mass

c)

A push or pull

d)

Acceleration

16.
The force that pulls things toward earth.
a)
Speed
b)
Gravity
17.

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

a)

normal force

b)

gravity

c)

friction

d)

applied force

18.
Are forces balanced or unbalanced when a marble speeds up rolling down a ramp?
a)
Balanced
b)
Unbalanced
19.

In a force diagram the size or length of the arrow tells you:

a)

the strength of the force

b)

the distance of the force

c)

the direction of the force

20.

A hockey puck glides to the right across the ice at a constant speed. Choose the right force diagram below.

a)
b)
c)
d)
21.

This object is being pushed on a surface. What direction would it be moving? (pick all that apply):

a)

up

b)

down

c)

left

d)

right

22.
If these boys 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.
23.

What type of force is this man using to push his grocery cart?

a)

Normal Force

b)

Gravity

c)

Air Resistance

d)

Applied Force

24.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

25.
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
26.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
27.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

28.

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

a)

friction

b)

force

c)

magnet

d)

gravity

29.
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.
30.
Balanced or unbalanced?
a)
balanced
b)
unbalanced
31.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

32.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
33.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
34.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
35.
What is a Force?
a)
The distance
b)
Mass
c)
A push or pull
d)
Give me a  failing grade 
36.
This type of force resist motion between two surfaces that are pressed together
a)
contact
b)
gravity
c)
friction
37.

If both forces are going in the same direction you should______ those forces

a)

Add

b)

Subtract

c)

Divide

d)

Multiply

38.

When forces are going in the opposite direction of each other you should do what do find the net force

a)

Subtract

b)

Add

c)

Divide

d)

Multiply

39.

What type of force is the BLUE arrow indicating?

a)

Applied Force

b)

Gravity

c)

Friction

d)

Normal Force

40.

The sky diver is currently accelerating due to gravity, what is the other force at work?

a)

Normal Force

b)

Friction

c)

Air Resistance

d)

Applied Force

41.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

42.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
43.

What is the overall Net Force?

a)

10 N, Left

b)

671 N, Right

c)

601 N, Left

d)

70 N, Right

44.
In which direction will the box accelerate?
a)
Down and to the left
b)
Up and to the right
c)
Up and to the left
d)
Down and to the right
45.

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

a)

inertia

b)

momentum

c)

friction

d)

applied force

46.

Force is measured & labeled with this unit

a)
Newtons
b)
Meters
c)

m/s

d)

Mass

47.

Forces are vectors which mean they have:

a)

Distance

b)

Time

c)

Mass

d)

Direction

48.

If textbooks are sitting still on a desk, are there any forces acting on it?

a)

Yes, unbalanced forces

b)

No, unbalanced forces

c)

Yes, balanced forces

d)

No, unbalanced forces downward

49.

Equal forces in opposite direction are called _____ forces.

a)

balanced

b)

inactivated

c)

neutral

d)

Frictional

50.

What type of force will cause an object to move?

a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
d)

Static force

51.

If both forces are going in the same direction you should______ to find the net force

a)

Add

b)

Subtract

c)

Divide

d)

Multiply

52.

When forces are going in the opposite direction of each other you should ________ to find the net force

a)

Subtract

b)

Add

c)

Divide

d)

Multiply

53.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
54.

Select 3 statements that apply to this picture

a)

There is a net force of 80 N

b)

It is a vector quantity

c)

The net force is 20N

d)

The motion will be towards the right

e)

The motion will be towards the left

55.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
56.
Balanced or Unbalanced?
a)
Balanced 
b)
Unbalanced
57.
When forces are _________ the object DOES NOT move.
a)
unbalanced
b)
balanced
c)
heavy
d)
light
58.
Calculate the Net Force. 
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
59.
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
60.
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.
61.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
62.

The force that opposes an movement on a surface is (a)  

63.

Liam, Daniel, and Zoe are playing with a ball in the park. They notice that whenever they throw the ball up, it always comes back down. They start talking about the force that pulls the ball towards the center of the Earth. Which force are they talking about?

a)

friction

b)

magnetism

c)

electricity

d)

gravity

64.

Avery, Emma, and Nora are participating in a skateboard race in their neighborhood. What force is responsible for slowing them down as they skate on the flat road?

a)

gravity

b)

friction

c)

inertia

d)

electromagnetism

65.

If the force of friction slows an object down, is the force of friction moving in the positive or negative direction?

a)

Positive (+F)

b)

Negative (-F)

66.

Using the tug-of-war picture to the left, are the forces being applied in the tug-of-war balanced or unbalanced?

a)

Balanced

b)

Unbalanced

67.

Using the tug-of-war picture to the left, what is the sum of forces or net force?

a)

0 N

b)

300 N to the left

c)

600 N

d)

300 N to the right

68.

Using the tug-of-war picture to the left, are the forces being applied in the tug-of-war balanced or unbalanced?

a)

Balanced

b)

Unbalanced

69.

Using the tug-of-war picture to the left, what is the sum of forces or net forces?

a)

300 N to the left

b)

100 N to the right

c)

200 N to the left

d)

0 N

70.

Liam, Samuel, and Nora are conducting a physics experiment. If they drop an object from a height, what would be the acceleration due to gravity on Earth that they should consider for their calculations?

a)

9.8 m/s/s

b)

7.5 m/s/s

c)

5 m/s/s

d)

1.6 m/s/s

71.

What is the SI unit of force?

a)

Second

b)

Newton

c)

Meter

d)

Kilogram

72.

George is standing on a flat surface. In which direction is the normal force exerted by the surface on George's feet?

a)

In the same direction of Gravity.

b)

In the opposite direction of Gravity.

c)

In the horizontal direction.

d)

Parallel to the force of gravity.

73.

What is the net force?

a)

5000 N right

b)

4000 N right

c)

40 N left

d)

4000 N left

74.

A man standing on a scale in an elevator notices that the scale reads 40 newtons greater than his normal weight.


Which type of movement of the elevator could cause this greater-than-normal reading?

a)

accelerating upward

b)

accelerating downward

c)

moving upward at a constant speed

d)

moving downward at a constant speed

75.

The force which acts perpendicular to the table, and which supports the computer resting on the table is called ........... force

a)

balanced

b)

unbalanced

c)

Normal

d)

Tension

76.

The sum of all forces acting on an object and direction is called the:

a)

Contact Force

b)

Balanced Force

c)

Unbalanced Force

d)

Net Force

77.
Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?
a)
Balanced
b)
Unbalanced
78.

Ted is trying to move a fridge through his house, he gets stuck on a carpet and even though he is pushing the fridge, it is not moving. What force is acting against him?

a)

gravity

b)

friction

c)

applied force

d)

normal force

79.

Forces are a vector so they have both a direction and a:

a)

Magnitude

b)

Motion

c)

Speed

d)

Height

80.

When determining the NET force on an object you should (TWO correct answers):

a)

subtract forces in opposite directions

b)

add forces in the same direction

c)

subtract forces in the same direction

d)

add forces in the opposite direction

e)

multiply the forces in the same direction

81.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
82.

What is the name of the missing force?

a)

applied force

b)

gravity

c)

friction

d)

normal force

83.

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

a)

normal force

b)

gravity

c)

friction

d)

applied force

84.

What is the name of the force being applied by the person pushing on the box?

a)

normal

b)

gravity

c)

applied

d)

friction

85.

What is the name of the force acting between the floor and the box?

a)

normal

b)

gravity

c)

applied

d)

friction

86.

What is the name of the force keeping the box on the floor?

a)

normal

b)

gravity

c)

applied

d)

friction

87.

What is the name of the force keeping the box from falling through the floor?

a)

normal

b)

gravity

c)

applied

d)

friction

88.
Sometimes tectonic plates do not move easily past one another, and the plates become stuck. Forces build up, and when the plates finally move, tension is released, as shown below. The sudden movement of the plates is caused by -

a)
the mass of the plates
b)
the weight of the plates
c)
unbalance forces
d)
gravitational force
89.

A wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

a)

Balanced Forces, Constant Speed

b)

Balanced Forces, Acceleration

c)

Unbalanced Forces, Constant Speed

d)

Unbalanced Forces, Acceleration

90.
If two forces act on an object in the same direction, the net force is the _____________
a)
the difference between the two forces
b)
the sum of the two forces
c)
Only one of the forces acts on the object
d)
DOOMSDAY!
91.
Why does a book on a table not move?
a)
No forces are acting on the book
b)
Gravity is the only force acting on the book
c)
Forces of the table pushing up and gravity pulling down are balanced
92.
(T or F?) A balanced force is only an object that is not moving. 
a)
True 
b)
False
93.

The coffee cup in the picture is at rest on the table. What is true about the Normal force?

a)

The normal force is exactly 15

b)

The normal force is less than 15

c)

The normal force is more than 15

d)

The normal force is -10

94.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

95.
Which is moving at a constant speed or not at all?
a)
a
b)
b
c)
c
d)
d
96.
Which is moving up?
a)
a & b
b)
b
c)
b & c
d)
d
97.

A force that move an object towards you

a)

Force

b)

Push

c)

Pull

98.

A force that moves an object away from you

a)

Force

b)

Push

c)

Pull

99.

A force applied by a person or object onto another object

a)

Applied Force

b)

Push

c)

Pull

100.

A force that opposes motion

a)

Applied Force

b)

Friction

c)

Normal Force

101.

A force exerted by a surface onto an object resting on that surface

a)

Applied Force

b)

Normal Force

c)

Friction

102.

The combined result of all forces acting on an object

a)

Newtons

b)

Net Force

c)

Contact Force

103.
What is the net force?
a)
5.5 N left
b)
5.5 N right
c)
2.5 N left
d)
2.5 N right
104.
What is the net force?
a)
65 N left
b)
65 N right
c)
35 N left
d)
35 N right
105.
What is the net force?
a)
11 N left
b)
11 N right
c)
3 N left
d)
3 N right
106.

A situation where the net force on a system is zero

a)

Acceleration

b)

Balance Force

c)

Deceleration

d)

Force

107.

Are the forcing acting on the object balanced or unbalanced? The squirrel is spinning.

a)

balanced

b)

unbalanced

108.

Are the forces acting on the object balanced or unbalanced? Mario is running fast but STEADY. His speed is 10 mi/hr.

a)

balanced

b)

unbalanced

109.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
110.

Friction can be increased by making the surface

a)

rough

b)

smooth

c)

does not depend on the nature of surface

d)

none of these

111.

In the figure a boy is seen pushing a box from right to left. The force of friction will act on the box

a)

from right to left

b)

from left to right

c)

vertically downwards

d)

vertically upwards

112.

What is acceleration due to gravity on Earth?

a)

98 m/s2

b)

9.8 m/s2

c)

0.98 m/s2

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