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Energy, Work, Power, Free Body Diagrams

Total questions: 50

Worksheet time: 1hrs 12mins

Name
Class
Date
1.

energy of motion

a)

kinetic energy

b)

potential energy

c)

movement

d)

work

2.

energy cannot be created or destroyed, only transferred

a)

Law of conservation of matter

b)

Law of conservation of energy

c)

Law of energy transfer

d)

Law of the universe

3.

The equation PE = mass x gravity x height is used to find which type of energy?

a)

Kinetic Energy

b)

Potential Energy

4.

The equation KE = 1⁄2 mass x velocity2 is used to find which type of energy?

a)

Kinetic Energy

b)

Potential Energy

5.

The coaster at B is at -

a)

Maximum PE, Minimum KE

b)

Minimum PE, Minimum KE

c)

Minimum PE, Maximum KE

d)

Maximum PE, Maximum KE

6.
A stretched rubber band.
a)
Potential
b)
Kinetic
7.

Kinetic energy depends on the ________ and ________ of the object.

a)

Height (position)

b)

Mass

c)

Speed

d)

Friction

8.

At which point of the roller coaster is potential energy the greatest?

a)

W

b)

X

c)

Y

d)

Z

9.

What two factors affect an object's kinetic energy?

a)

area and volume

b)

mass and weight

c)

weight and height

d)

mass and speed

10.

Kinetic energy is measured in

a)

Newtons (N)

b)

Joules (J)

c)

Kilograms (kg)

d)

miles per hour (mph)

11.

Mass and speed both affect the amount of kinetic energy an object has, but ____________ has a greater effect.

a)

mass

b)

speed

c)

volume

d)

weight

12.
How much KE does a moving 6 kilogram object have if it moves with a velocity of 3 m/s?
a)
27 J
b)
18 J
c)
9 J
d)
2 J
13.
Gravitational potential energy depends on the ________ and ________ of the object. 
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction 
14.

What is the PE at the top of the ramp?

a)

0

b)

40 J

c)

80 J

d)

none of the above

15.
What is the KE of a football which has a mass of 0.8 kg and is kicked at a velocity of 10m/s.
a)
80 J
b)
3.2 J
c)
160 J
d)
40 J
16.

What is the value of the Earth's acceleration due to gravity (g)?

a)

9.8 m/s2

b)

100 m/s2

c)

25 m/s2

d)

3.14 m/s2

17.

Which of the following is the correct equation for calculating an object's gravitational potential energy?

a)

PE = mgh

b)

PE = mg / h

c)

PE = mg + h

d)

PE = gh

18.

Which is the correct unit for expressing gravitational potential energy?

a)

Joule

b)

Newton

c)

m/s2

d)

meter

19.

One of the tallest radio towers is in Fargo, North Dakota. The tower is 629 m tall. If a bird lands on top of the tower with a mass of 0.3kg. What is the birds GPE?

a)

1849.26 J

b)

184926 J

c)

1849.26 N

d)

188.7 J

20.

1. An owl has a mass of 4.00 kg. It dives to catch a mouse from a height of 20m How much GPE does the owl gain?


a)

784 J

b)

784 N

c)

40 J

d)

40 N

21.
Which of the following is a true statement about work?
a)
It measures how quickly an object accelerates 
b)
It measures how much effort is applied over a certain distance
c)
It measures the change in an object's rate of speed
d)
It measures how much time it takes to move a massive object
22.
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 
a)
77 J
b)
7.7 J 
c)
0.7 J 
d)
770 J 
23.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts
24.

Calculate the PE of a 10 kg bicycle while parked at the top of a cliff that is 30 m high.

a)

2490 J

b)

2,940 J

c)

300 J

d)

3, 000 J

25.
What is the standard unit force is measured in?
a)
Newtons
b)
pounds
c)
grams
d)
meters
26.
How do we calculate work?
a)
W = F * d
b)
w = f * D
c)
W = F * D
d)
w = f * d
27.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
28.
The SI unit of work is?
a)
Joules
b)
Watts
c)
Newtons
d)
meters
29.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
30.

A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?

a)

18 m

b)

4 m

c)

10 m

d)

6 m

31.
Two factors that determine work are
a)
size of the force, and distance
b)
size of the force, and type of force
c)
mass, and distance
32.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts
33.
You move an 8-newton weight five meters in 4 seconds. How much power have you generated?
a)
160 watts
b)
10 watts
c)
6.4 watts
d)
17 watts
34.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
35.

What do the arrows or vectors represent?

a)

Forces acting on the object

b)

All the acceleration acting on the object

c)

All the ways an object can move

36.

Name the missing force.

a)

Weight force

b)

Normal force

c)

Frictional force

d)

Tension force

37.

Name the missing force...

a)

Frictional force

b)

Weight force

c)

Thrust

d)

Buoyant force

38.

Whenever an object is in motion, there is always a force opposing the motion:

a)

inertia

b)

momentum

c)

friction

d)

applied force

39.

The force that prevents objects from sinking into surfaces is known as:

a)

normal

b)

abnormal

c)

static

d)

inertia

40.

What is the net force of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

41.

This object could be moving in which directions? (pick all that are correct):

a)

Up

b)

Down

c)

Left

d)

Right

42.

The down-arrow in this diagram most likely represents:

a)

gravity

b)

normal

c)

a push or pull

d)

friction

43.

When two forces 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

44.

How do you calculate the net force when forces are going in the opposite direction?

a)

Add the forces

b)

Divide the forces

c)

Find a fraction of the forces

d)

Subtract the forces

45.

What do the arrows represent in a free body diagram? (Select two)

a)

Object

b)

Direction

c)

Size

d)

Mass

46.

This is defined as forces that are equal in magnitude.

a)

Unbalanced Forces

b)

Forces

c)

Balanced Forces

d)

Net force

47.

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

a)
b)
c)
d)
48.

If this object were moving to the right, the left-arrow in this diagram would most likely represent:

a)

gravity

b)

normal

c)

a push or pull

d)

friction

49.

Which diagram best shows person pushing a couch (accelerating) across the floor?

a)
b)
c)
d)
50.

What is the unit of Power?

a)

Watt

b)

Newton

c)

Joule

d)

m/s2

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