# Download ExamView - ch 13 Section 3 Energyc.tst

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Transcript
```Name: ________________________ Class: ___________________ Date: __________
ID: C
Chapter 13 Section 3
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1. A dog running at a speed of 12 m/s has 1,080 J of kinetic energy. What is the mass of the dog?
a. 7.5 kg
c. 30 kg
b. 15 kg
d. 45 kg
2. Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a
3.
4.
5.
6.
7.
8.
9.
10.
a. 164 J
c. 402 J
b. 3.3 × 102 J
d. 1.6 × 103 J
An astronaut with a mass of 91 kg is 0.30 m above the moon’s surface. The astronaut’s potential energy is 46
J. Calculate the free-fall acceleration on the moon.
a. 0.15 m/s2
c. 6.6 m/s2
2
b. 1.7 m/s
d. 9.8 m/s2
Gravitational potential energy depends on
a. the mass of the object.
c. the acceleration due to gravity.
b. the height of the object.
d. All of the above
What is the kinetic energy of a 1.40 kg discus with a speed of 22.5 m/s?
a. 15.8 J
c. 354 J
b. 31.5 J
d. 709 J
The primary source of the sun’s energy is
a. chemical energy.
c. nuclear fission.
b. nuclear fusion.
d. potential energy.
At the top of its arc, a thrown ball has _____ potential energy.
a. maximum
c. zero
b. minimum
d. average
Which of the following is an example of mechanical energy?
a. nuclear energy
c. chemical energy
b. potential energy
d. light energy
When a pitcher throws a softball to a catcher, the vibration of the atoms that make up the softball is _____
energy, while the motion of the ball toward the catcher is _____ energy.
a. nonmechanical, mechanical
c. electrical, thermal
b. potential, nonmechanical
d. mechanical, chemical
What is the gravitational potential energy of a 54 kg box that is 8.0 m above the ground?
a. 5,500 J
c. 3,400 J
b. 4,300 J
d. 550 J
Essay
11. How does a pendulum show the relationship between gravitational potential energy and kinetic energy?
1
ID: C
Chapter 13 Section 3
MULTIPLE CHOICE
1. ANS: B
OBJ: 3
2. ANS: D
3.
4.
5.
6.
7.
8.
9.
10.
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
2
B
2
D
2
C
3
B
4
A
1
B
2|3
A
4
C
2
PTS:
STA:
PTS:
STA:
PTS:
STA:
PTS:
1
PS.11| PS.12
1
PS.13
1
PS.13
1
DIF:
1
REF: 3
DIF:
1
REF: 3
DIF:
1
REF: 3
DIF:
1
REF: 2
PTS:
STA:
PTS:
STA:
PTS:
STA:
PTS:
STA:
PTS:
STA:
PTS:
STA:
1
DIF:
PS.11| PS.12
1
DIF:
PS.14| PS.16| PS.18
1
DIF:
PS.15
1
DIF:
PS.13
1
DIF:
PS.14| PS.16| PS.18
1
DIF:
PS.13
1
REF: 3
1
REF: 3
1
REF: 4
1
REF: 3
1
REF: 3
1
REF: 3
ESSAY
11. ANS:
When a pendulum swings back and forth, it goes from having zero kinetic energy at the top of its path to
having a maximum amount of kinetic energy at the bottom of its path. At the same time, it goes from having a
maximum amount of gravitational potential energy to having a minimum amount of gravitational potential
energy.
PTS: 1
STA: PS.15
DIF:
1
REF: 4
1
OBJ: 1
```
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