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Net Forces and Free Body Diagrams

Total questions: 30

Worksheet time: 27mins

Name
Class
Date
1.

Unless an object is floating in space, what is more than likely always going to be a force present on a free body diagram?

a)

Normal Force

b)

Gravity

c)

Friction

d)

Applied Force

2.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
3.

What is the force that opposes the motion of an object?

a)

Friction

b)

Gravity

c)

Applied Force

d)

Normal Force

4.

What is the force that keeps objects on a table?

a)

Friction

b)

Gravity

c)

Applied Force

d)

Normal Force

5.

What is the force that pulls objects towards the center of the Earth?

a)

Friction

b)

Gravity

c)

Applied Force

d)

Normal Force

6.

What is the force that occurs when two objects rub against each other?

a)

Friction

b)

Gravity

c)

Applied Force

d)

Normal Force

7.

What is the force that is exerted on an object by a person or another object? (a push or pull)

a)

Friction

b)

Gravity

c)

Applied Force

d)

Normal Force

8.

What type of force is the RED arrow indicating?

a)

Applied force

b)

Tension

c)

Spring

d)

Friction

9.

What is the type of force that both the ground and the wall exerts on the sitting man?

a)

Friction

b)

Gravity

c)

Applied Force

d)

Normal Force

10.

Besides gravity, what other type of force is present here?

a)

Applied Force

b)

Normal Force

c)

Air Resistance

d)

Tension

11.

What type of force is the BLUE arrow indicating?

a)

Applied Force

b)

Gravity

c)

Friction

d)

Normal Force

12.

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

13.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

14.

Gravity is pushing down on everything which is balanced by normal force. What force inside the bed acts against the man?

a)

Friction

b)

Tension

c)

Spring

d)

Applied Force

15.

What is the overall Net Force?

a)

10 N, Left

b)

671 N, Right

c)

601 N, Left

d)

70 N, Right

16.
Calculate the net force shown in the  diagram?
a)
41 N
b)
25 N
c)
16 N
d)
9 N
17.
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
18.

Two forces, 40.2 N and -62.5 N, are acting on an object. Which best represents the resultant force if the first acts upward and the second acts downward?

a)

22.3 N

b)

-22.3 N

c)

102.7 N

d)

-102.7 N

19.
Name the missing force...
a)
spring force
b)
weight force
c)
normal force
d)
buoyant force
20.
Name the missing force...
a)
tension force
b)
frictional force
c)
normal force
d)
spring force
21.
What is the direction of the force of gravity acting on the box?
a)
down the ramp to the right
b)
straight up
c)
straight down
d)
up the ramp to the left
22.

Force is a vector. Vectors have both _____ and direction.

a)

velocity

b)

displacement

c)

magnitude

d)

gravity

23.

The unit used to measure forces is called the Newton.

a)

TRUE

b)

FALSE

24.

What is the net force?

a)

3 N Right

b)

3 N Left

c)

17 N Right

d)

17 N Left

25.

What is the net force on this object?

a)

to the right with a strength of 11 Newtons.

b)

to the left with a strength of 7 Newtons.

c)

to the right with a strength of 25 Newtons.

d)

to the left with a strength of 6 Newtons.

26.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
27.

A squirrel sits on the ground and eats a donut. If the ground pushes up on the squirrel with a force of 11 N, The squirrel and donut together weigh ...

a)

less than 11 N

b)

Exactly 11 N

c)

More than 11 N

28.

The Car in the picture is moving to the right at a constant velocity. Any friction present would be pushing the car to the ...

a)

Up

b)

Right

c)

Down

d)

Left

29.
Match description with free-body diagram.
a)
A book is at rest on a tabletop.
b)
A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling. Diagram the forces acting on the combination of gymnast and bar.
c)
An egg is free-falling from a nest in a tree. Neglect air resistance.
d)
A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance.
30.

Which of the following is true about this free-body diagram?

a)

the forces are are balanced

b)

the object is free-falling

c)

the object is moving upward

d)

the forces are unbalanced