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practice test on KE, PE and Work

Total questions: 37

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

What type of energy is possessed by a moving object?

a)

chemical energy

b)

potential energy

c)

kinetic energy

d)

sound energy

2.

A roller coaster sitting at the highest point of its track has what type of energy?

a)

kinetic energy

b)

potential energy

c)

sound eergy

d)

electrical energy

3.

Calculate the potential energy of a book that has a mass of 0.25 kg and is 2 m high.


(PE = mass × g × height)

(g = 9.8 m/s/s)

a)

49 J

b)

4.9

c)

1321 J

d)

4.9 J

4.

Calculate the potential energy (PE) of dog that has a mass of 12 kg and is 3 m high


(PE = mass × g × height)

g = 9.8 m/s/s

a)

352.8

b)

12 J

c)

352.8 J

d)

12

5.

Calculate the kinetic energy (KE) of a dog that has a mass of 15 kg and is running with a velocity of 7 m/s


(KE = 0.5 × mass × velocity2)

a)

367.5 J

b)

367.5

c)

18928 J

d)

18928

6.

Calculate the kinetic energy (KE) of a dog that has a mass of 15 kg and is running with a velocity of 7 m/s


(KE = 0.5 × mass × velocity2)

a)

367.5 J

b)

367.5

c)

18928 J

d)

18928

7.

Energy is often lost during energy transformation. The lost energy is called

a)

useful energy

b)

useless energy

c)

heat energy

d)

wasted energy

8.

What kind of energy is in a person climbing a ladder?

a)

Potential

b)

Kinetic

c)

Both

d)

None

9.

This ball sits at the top of the hill and later gets pushed down. For letter A on this diagram, how much KINETIC energy does the ball have? Answer with a NUMBER, not a word.

(a)  

10.

This ball sits at the top of the hill and later gets pushed down. For letter B (halfway down) on this diagram, how much POTENTIAL energy does the ball have? Answer with a NUMBER, not a word.

(a)  

11.
Conservation of energy states that energy cannot be ________ or ________, but can be altered from one form to another.
a)
created, destryoed
b)
gravity, force
c)
heat, created
12.
How do you calculate the total amount of energy?
a)
PE + TE + KE
b)
(PE)(TE)(KE)
c)
PE + KE
d)
KE + TE
13.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
14.
What is the unit of measurement for kinetic energy?
a)
Watts
b)
Joules
c)
Newtons
d)
Meters
15.
Gravitational potential energy depends on the ________ of the object. 
a)
Height (position)
b)
chemical makeup
c)
Mass 
d)
Stretch
16.

a)

PE

b)

KE

17.

Object A has a mass of 1 kg and a speed of 2 m/s. Object B has a mass of 2 kg and a speed of 1 m/s. Objects A and B have the same kinetic energy.

a)

True

b)

False

18.

If the mass of a moving object is doubled, then its kinetic energy will be doubled as well.

a)

True

b)

False

19.

W= 125 J

d = 10 m

F = ???

a)

12.5 N

b)

1250 N

c)

0.08 N

d)

135 N

20.

If 250 Joules of work is needed to move a box 10 meters, what force was used?

a)

25 Joules

b)

25 Newtons

c)

2,500 Joules

d)

2,500 Newtons

21.

W= 125 J

d = 10 m

F = ???

a)

12.5 N

b)

1250 N

c)

0.08 N

d)

135 N

22.
Which has greater  kinetic energy a car traveling at 30 km/h or a half as massive car traveling at 60 km/h
a)
the 60 km/hr car
b)
both have the same kinetic energy
c)
the 30 km/hr car
23.
when a car's speed triples its kenetic energy 
a)
remains the same
b)
triples
c)
increases by four times
d)
increases by nine times
24.

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

25.

What is the kinetic energy of a zorb and human with a total mass of 90Kg rolling at 10m/s?

a)

3,700J

b)

900J

c)

4,500J

d)

6,500J

26.

You serve a volley ball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s. How much kinetic energy does the ball have?

a)

1890 J

b)

3780 J

c)

945 J

d)

31.5 J

27.

An explosion of gas from a Hawaiian volcano blows a rock into the sky. The rock reaches 100 meters in height. It has a mass of 5 kg. How much potential energy does the rock have before it begins falling back to earth?

a)

500J

b)

50J

c)

4,905 J

d)

49.05J

28.
Roger Federer’s tennis ball has a mass of 0.3 kg. If he holds the ball above the ground at a height of 2.0 m to serve, what is its gravitational potential energy (GPE)?
a)
5.88 J
b)
0.6 J
c)
6.67 J
d)
0.15 J
29.
A leopard with a mass of 55.00 kg climbs 12.0 m up a tree. What is its GPE?
a)
6,468 J
b)
660 J
c)
4.58 J
d)
0.22 J
30.

An aircraft is taking a group of skydivers up into the air. Evan is dressed in his parachuting outfit, which brings his mass to a total of 90.0 kg. The aircraft takes the group to a height of 5000m before the jump. How much GPE does Evan have before jumping?

a)

4,410,000 J

b)

450,000 J

c)

55.56 J

d)

0.018 J

31.

Devon is playing with a yo-yo. A yo-yo has an axle in the middle of two plastic halves. A string is tied around this axle. As Devon moves his hand, the yo-yo goes up and down. The yo-yo converts potential energy to kinetic energy as it moves.

Which of the following pictures represents the yo-yo with the most potential energy?

a)
b)
c)
d)
32.

An asteroid is falling toward planet Earth from space. It has a height of 100,000 km.


As the asteroid falls closer to the Earth's surface, its _______ energy decreases and its _______ energy increases.

a)

chemical; heat

b)

kinetic; gravitational potential

c)

heat; chemical

d)

gravitational potential; kinetic

33.

In which of these is work being done?

a)

a child rolling a ball up a hill

b)

a horse pulling a buggy

c)

a mother pushing her baby on a swing

d)

all of these

34.

Clyde and Marilyn are riding a roller coaster. During which section(s) of the track is their kinetic energy converted to potential energy?

a)

from point B to point D only

b)

from point A to point B and from point C to point D

c)

from point A to point B only

d)

from point B to point C only

35.

 There is a bell at the top of a tower that is 45 m high. The bell has a mass of 19.39 kg. The bell has _____________________ energy. Calculate it. (g = 9.8)

 KE=0.5×m×v2KE=0.5\times m\times v^2   PE=mghPE=mgh  

a)

kinetic, 8,459 J

b)

kinetic, 19,632 J

c)

potential, 8,551 J

d)

potential, 872.55 J

36.

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has ______________________ energy. Calculate it.  (g = 9.8)

 KE=0.5×m×v2KE=0.5\times m\times v^2   PE=mghPE=mgh  

a)

kinetic, 945 J

b)

kinetic, 900 J

c)

potential, 617 J

d)

potential, 66 J

37.

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has ______________________ energy. Calculate it.  (g = 9.8)

 KE=0.5×m×v2KE=0.5\times m\times v^2   PE=mghPE=mgh  

a)

kinetic, 945 J

b)

kinetic, 900 J

c)

potential, 617 J

d)

potential, 66 J