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Kinetic and Potential Energy - Web Practice
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. Greg applies a force of 100 N to move a box 5 meters. How much work did he do?
a. 100 J
c. 5 J
b. 500 J
d. 500 N
____
2. When there is friction on a roller coaster, some of the potential energy is NOT converted into
a. kinetic energy.
c. light energy.
nuclear
energy.
b.
d. chemical energy.
____
3. When a bat hits a baseball, which of the following is transferred from the bat to the ball?
a. work
c. force
b. energy
d. electrical energy
____
4. As a baseball flies through the air after being hit, which of the following types of energy does it have?
a. potential energy
c. mechanical energy
b. kinetic energy
d. chemical energy
____
5. Which of the following is the formula for finding kinetic energy?
a. KE = m/v
c. KE = mv2/2
b. KE = mv/2
d. KE = v/2
____
6. After an energy conversion, you end up with the same total amount of energy as the original amount of
potential energy. Which of the following laws explains this rule?
a. law of energy changes
c. law of power and energy
b. law of conservation of energy
d. law of potential energy
____
7. Which of the following is true at the point where you reach the top of your jump on a trampoline?
a. The mechanical energy is zero.
b. The potential energy is at a maximum.
c. The kinetic energy and potential energy are equal.
d. The potential energy is zero.
____
8. What is the ability to do work called?
a. movement
b. energy
c. power
d. force
9. What is the energy of motion called?
a. potential energy
b. mechanical energy
c. kinetic energy
d. force energy
____
____
10. Which of the following laws states that energy cannot be created or destroyed?
a. law of conservation of power
c. law of changing energy
b. law of conservation of energy
d. law of energy changes
Completion
Complete each statement.
11. As the potential energy of an object decreases, the kinetic energy of the object
________________. This is a(n) _________________ relationship.
Short Answer
12. What are two things that must happen for work to be done?
13. Why are you not doing any work when you are carrying your backpack to class at a constant speed?
14. Compare energy and work. What does one have to do with the other?
15. Demonstrate the conversion of potential energy to kinetic energy by using a pendulum model.
Use the image below to answer the following questions.
16. At which point(s) does the pendulum have the most potential energy?
17. At which point(s) does the pendulum have the most kinetic energy?
18. Name two point where the pedulum is increasing in kinetic energy.
19. At point “D” the pendulum is _______________ kinetic energy becuase it is
__________________ its speed. Meanwhile it is _______________ potential energy becuase it is
__________________ its height.
Essay
20. Mrs. Kent is placing boxes of books on some shelves. When she needs to place the same boxes on a higher
shelf, how is the gravitational potential energy of the boxes affected?
Kinetic and Potential Energy - Web Practice
Answer Section
MULTIPLE CHOICE
1. ANS:
OBJ:
2. ANS:
OBJ:
3. ANS:
OBJ:
4. ANS:
OBJ:
5. ANS:
6. ANS:
OBJ:
7. ANS:
OBJ:
8. ANS:
OBJ:
9. ANS:
OBJ:
10. ANS:
OBJ:
B
2
A
1
B
1
B
1
C
B
2
B
1
B
1
C
2
B
2
PTS:
1
DIF:
2
REF: 1
PTS:
1
DIF:
1
REF: 3
PTS:
1
DIF:
1
REF: 1
PTS:
1
DIF:
1
REF: 1
PTS:
PTS:
1
1
REF: 1
DIF: 1
OBJ: 2
REF: 3
PTS:
1
DIF:
2
REF: 3
PTS:
1
DIF:
1
REF: 1
PTS:
1
DIF:
1
REF: 1
PTS:
1
DIF:
1
REF: 3
SHORT ANSWER
11. ANS: increses, inverse
PTS: 1
12. ANS:
A force must be exerted on an object, and the object must move in the direction of the force.
PTS: 1
13. ANS:
DIF:
1
REF: 1
OBJ: 1
Answers may vary. Sample answer: The backpack is not moving in the same direction as the force being
applied to it.
PTS: 1
14. ANS:
DIF:
2
REF: 1
Energy is the ability to do work. Work cannot occur without energy.
OBJ: 1
PTS: 1
15. ANS:
DIF:
1
REF: 1
OBJ: 1
As the pendulum is lifted upward, it gains potential energy. When the pendulum is released and swings
downward, that potential energy is converted to kinetic energy.
PTS: 1
16. ANS:
DIF:
1
REF: 2
OBJ: 2
The pendulum has maximum potential energy at points A and E.
PTS: 1
18. ANS:
a and b
DIF:
2
REF: 3
OBJ: 1
PTS: 1
19. ANS:
decreasing, decreasing, increasing, increasing
PTS: 1
17. ANS:
The pendulum has maximum kinetic energy at point C.
PTS:
1
DIF:
2
REF: 3
OBJ: 1
ESSAY
20. ANS:
Answers may vary. Sample answer: The gravitational potential energy of the boxes will increase because
she needs to raise the boxes to a higher shelf.
PTS:
1
DIF:
2
REF: 4
OBJ: 2