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Unit 3 Practice Test

Total questions: 73

Worksheet time: 2hrs 45mins

Name
Class
Date
1.

Energy due to motion is (a)   energy.

Choose from the below words

Kinetic

Potential

Energy

Friction

2.

Gravitational potential energy depends on the (a)   and (b)   of the object.

Choose from the below words

Height

Mass

Movement

Friction

3.

What kind of energy is in a rock at the edge of a cliff?

a)

Potential Gravitational

b)

Elastic Potential

c)

Chemical Potential

d)

Kinetic

4.

What type of energy is in a stretched rubber band?

a)

Elastic Potential

b)

Chemical Potential

c)

Kinetic

d)

Gravity Potential

5.

At which point is potential energy greatest?

a)

W

b)

Y

c)

X

d)

Z

6.

When a pendulum swings, at which point is kinetic energy highest?

a)

3

b)

1

c)

2

d)

4

7.

When a pendulum swings, at which point is potential energy at its greatest?

a)

1

b)

2

c)

3

d)

4

8.

Explain what happens to the potential energy of a rock as it falls off the side of a cliff.

a)

The potential energy decreases as the kinetic energy increases.

b)

The kinetic energy decreases as the potential energy increases.

c)

The kinetic energy decreases as the potential energy decreases.

d)

The potential energy decreases as the kinetic energy decreases.

9.

Conservation of energy means that energy can neither be created nor destroyed.

a)

energy can be created but not destroyed.

b)

energy can both be created and destroyed.

c)

energy can be destroyed but not created.

10.

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?

a)

3920000 J

b)

294 J

c)

180000 J

d)

1225 J

11.

What is the kinetic energy of a 1,600kg Mustang travelling at 15 m/s?

a)

180000 J

b)

294 J

c)

1225 J

d)

3920000 J

12.

What is the unit for force?

a)

Newton (N)

b)

kilogram (kg)

c)

meter (m)

d)

Joule (J)

13.

A 2kg television falls from 1 meter. How much energy does it have?

a)

19.6 J

b)

196 J

c)

9.8J

d)

2 J

14.

The law of (a)   states that energy in a system can change forms but can never be created or destroyed.

Choose from the below words

conservation of energy

law of mass action

conservation of inertia

law of gravity

15.

When a ball is dropped it bounces until it eventually stops. Why does this happen?

a)

Some of the ball’s energy is converted to other forms, such as thermal and sound

b)

Some of the ball’s energy is lost

c)

All of the ball’s energy is eventually converted to potential energy when the ball stops bouncing

d)

All of the ball’s energy is eventually converted to kinetic energy when the ball stops bouncing.

16.

Energy stored in food would be considered

a)

chemical potential

b)

thermal

c)

kinetic

d)

movement through a vacuum

17.

Where is kinetic energy at its maximum?

a)

a

b)

b

c)

c

d)

d

18.

What is the kinetic energy at position Y? (ignore friction)

a)

10000 J

b)

20000 J

c)

0 J

d)

5000 J

19.

Heat is another name for

a)

thermal energy

b)

mechanical energy

c)

electrical energy

d)

gravitational energy

20.

Identify the type of energy represented by the illustration.

a)

radiant energy

b)

electric energy

c)

elastic energy

d)

chemical energy

21.

Identify the type of energy represented by the illustration.

a)

Thermal Energy

b)

Nuclear Energy

c)

Elastic Energy

d)

Electrical Energy

22.

Identify the energy transfer from the image.

a)

chemical to electrical to light

b)

electrical to chemical to light

c)

kinetic to potential

d)

light to sound

23.

Identify the energy transfer.

a)

mechanical to sound

b)

chemical to electrical

c)

sound to mechanical

d)

thermal to sound

24.

Identify the energy transfer.

a)

solar to electrical

b)

light to heat

c)

thermal to chemical

d)

chemical to mechanical

25.

Where would this tossed baseball have the least amount of kinetic energy?

a)

x

b)

w

c)

y

d)

z

26.

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

27.

In which of these cases is work being done?

a)

A student carries his chair into another room

b)

A student pushes a locked door that does not move

c)

A student sleeps

d)

A student sits on the carpet

28.

The amount of work done in a certain amount of time is known as

a)

power

b)

effort force

c)

work

d)

resistance force

29.

A person uses 20N of force to push a lawn mower 10 meters. How much work does that person do?

a)

200 J

b)

2 J

c)

0.5 J

d)

20 J

30.

A horse performs 15000 joules of work pulling a wagon for 20 seconds. What is the horse's power?

a)

750 W

b)

15000 W

c)

30000 W

d)

20 W

31.

A strongman exerts 1500 N on the side of a building. After 2 minutes, the building doesn't move. How much work did he do?

a)

0 J

b)

3000 J

c)

1500 J

d)

2 J

32.

You use 950 J of energy to push a sofa. If it took you 5 sec to move the sofa, what was your power?

a)

190 W

b)

950 W

c)

5 W

d)

4750 W

33.

A box is pushed across the floor a distance of 8 m with a force of 55 N in 7 s. What is the work done?

a)

440 J

b)

62.9 J

c)

440 W

d)

62.9 W

34.

The unit of power was named after...

a)

James Watt

b)

James Joule

c)

Isaac Newton

d)

Renee Descartes

35.

A light bulb consumes 100 Watts. If it is left on for 20 seconds, how much work does it do?

a)

2,000 J

b)

5 J

c)

100 J

d)

0.2 J

36.

Which variable DOES NOT determine the amount of work done on an object?

a)

time

b)

mass

c)

distance

d)

acceleration

37.

An explosion of gas from a Hawaiian volcano blows a rock into the sky. The rock has 2000J of kinetic energy. What was its mass if the rock had a velocity of 20m/s?

a)

10Kg

b)

20,000Kg

c)

200Kg

d)

2000 Kg

38.
A kid throws a ball with a force of 70N over 1.1 meters. How much work did he do?
a)
77 joules
b)
70 joules
c)
7.7 joules
d)
11 joules
39.

A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has she done?

a)

600 J

b)

450 J

c)

900 J

d)

1200 J

40.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
41.

A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?

a)

50J

b)

50W

c)

500J

d)

500W

42.

How much power is generated by Ashley (50 kg) running up a 6 m flight of stairs in 5 seconds?

a)

60 W

b)

62 W

c)

600 W

d)

1500 W

43.
How does heat flow?
a)
Always from cold to warm
b)
Always from warm to cold
c)
Both warm to cold & cold to warm
d)
It depends on the temperature
44.
When a  piece of aluminum foil is taken out of the oven and cools from 100° C to 50°C, What is the change in temperature?
a)
50°
b)
0°
c)
100°
d)
150°
45.
The specific heat of aluminum is 0.21 cal/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
a)
105 J
b)
10.5 J
c)
1.05 J
d)
50 J
46.
The amount of energy required to raise the temperature 1ºC for every kilogram is called____?
a)
Thermal Energy
b)
Specific Heat
c)
Temperature
d)
Kinetic Energy
47.
What is the symbol for Thermal Energy?
a)
Q
b)
t
c)
m
d)
C
48.
What is the equation to measure change in Thermal Energy?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ∆mct
d)
m=QC
49.

The formula for calculating gravitational potential energy is...

a)

1/2 x mass2 x gravitational field strength x height

b)

mass x gravitational field strength x height

c)

1/2 x mass x gravitational field strength x height

d)

mass x gravitational field strength x height2

50.
What type of energy is in this picture?
a)
Kinetic
b)
Potential
c)
Chemical
d)
Sound
51.

Which is the Potential energy from most to least on the stairs?

a)

D, C, B, A

b)

A, B, C, D

c)

C, B, A D

d)

D, A, B, C

52.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

1

b)

2

c)

3

d)

4

53.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

54.

At which position does the child on the swing have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

55.
How far will an object move in 12 seconds if it is traveling at a velocity of 8 m/s?
a)
96 m
b)
0.7 m
c)
20 m
d)
4 m
56.

The image below shows four soccer balls at different locations on an uneven soccer field. Which ball has the greatest amount of KINETIC energy?

a)

Ball A

b)

Ball B

c)

Ball C

d)

Ball D

57.

What are the units for energy?

a)

Watts

b)

Joules

c)

Newtons

d)

meters

58.

A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is

a)

60 J

b)

600 J

c)

17 J

d)

2.4 J

59.

Where does the pendulum have the greatest potential energy? (pick 2)

a)

A

b)

B

c)

C

d)

D

e)

E

60.

Where is potential energy changing to kinetic energy?

a)

a

b)

b

c)

c

d)

d

61.

What is the kinetic energy at position X? (ignore friction)

a)

0J

b)

1,000J

c)

19,000J

d)

can not be determined

62.

What is the formula for work?

a)

Force = work × distance

b)

Distance = force × work

c)

Work = force × distance

d)

Work = force × mass

63.

Units of mass (m)

a)

s

b)

N

c)

kg

d)

kg m/s

64.

A crane lifts a 500 kg load to a height of 10 meters. How much work is done by the crane? (Assume g = 9.8 m/s²)

a)

49,000 J

b)

5,000 J

c)

9,800 J

d)

50,000 J

65.

Identify the energy transfer

a)

chemical to kinetic

b)

solar to electrical

c)

thermal to light

d)

electrical to light

66.

Identify the energy transfer

a)

mechanical to light

b)

chemical to kinetic

c)

electrical to mechanical

d)

kinetic to thermal

67.

Identify the energy transfer

a)

chemical to electrical to sound

b)

sound to electrical to chemical

c)

electrical to sound to chemical

d)

potential to kinetic to light

68.

Identify the energy transfer

a)

sound to kinetic

b)

sound to light

c)

mechanical to sound

d)

chemical to sound

69.

What energy transformation occurs if a person cranks a handle & it causes a lightbulb to turn on?

a)

mechanical --> electric

b)

nuclear --> thermal

c)

electric --> mechanical

d)

kinetic --> potential

70.

Warm air over the beach rises while cooler dense air from the ocean rushes in due to ________.

a)

conduction

b)

radiation

c)

convection

71.

Hot coffee is stirred with a spoon, the spoon gets hot due to

a)

conduction

b)

radiation

c)

convection

72.

A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to ________.

a)

conduction

b)

radiation

c)

convection

73.

The metal skewer gets so hot that you drop your marshmallow in the campfire because of ________. More than one answer.

a)

conduction

b)

radiation

c)

convection

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