GP Practice Test ch 11-12
GP Practice Test ch 11-12
GP Practice Test ch 11-12
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<strong>GP</strong> <strong>Practice</strong> <strong>Test</strong> <strong>ch</strong> <strong>11</strong>-<strong>12</strong><br />
Problem<br />
1. If a force of 52 N stret<strong>ch</strong>es a spring 0.36 m, what is the spring constant?<br />
2. How mu<strong>ch</strong> displacement will a coil spring with a spring constant of <strong>11</strong>0 N/m a<strong>ch</strong>ieve if it is stret<strong>ch</strong>ed by a 70<br />
N force?<br />
3. An amusement park ride has a frequency of 0.064 Hz. What is the ride’s period?<br />
4. An amusement park ride swings back and forth once every 17.4 s. What is the ride’s frequency?<br />
5. A truck with bad shock absorbers bounces up and down after hitting a bump. The truck has a mass of 1700 kg<br />
and is supported by four springs, ea<strong>ch</strong> having a spring constant of 6200 N/m. What is the period for ea<strong>ch</strong><br />
spring?<br />
6. On the planet Xenos, an astronaut observes that a 1.88 m long pendulum has a period of 1.85 s. What is the<br />
free-fall acceleration on Xenos?<br />
7. What is the intensity of sound waves produced by a trumpet at a distance of 3.1 m when the power output of<br />
the trumpet is 0.42 W?<br />
8. The noise of a certain lawn mower has a power of 0.26 W. At what distance will the intensity of the lawn<br />
mower’s sound be 7.2 10 W/m ?<br />
9. What length of guitar string would vibrate at a fundamental frequency of 845 Hz if the string is stret<strong>ch</strong>ed so<br />
that the velocity of waves on the string is 574 m/s?<br />
10. What is the length of an open pipe in whi<strong>ch</strong> the fourth harmonic has a frequency of 3860 Hz? The speed of<br />
sound is 346 m/s.<br />
<strong>11</strong>. As two notes are sounded, 9 beats per second are heard. The frequency of one note is 536 Hz. What are the<br />
two possible frequencies of the other note?
<strong>GP</strong> <strong>Practice</strong> <strong>Test</strong> <strong>ch</strong> <strong>11</strong>-<strong>12</strong><br />
Answer Section<br />
PROBLEM<br />
1. ANS:<br />
140 N/m<br />
OBJ: <strong>11</strong>-1.3<br />
2. ANS:<br />
–0.6 m<br />
OBJ: <strong>11</strong>-1.3<br />
3. ANS:<br />
16 s<br />
OBJ: <strong>11</strong>-2.3<br />
4. ANS:<br />
5.75 10 Hz<br />
OBJ: <strong>11</strong>-2.3<br />
5. ANS:<br />
1.6 s<br />
OBJ: <strong>11</strong>-2.3<br />
6. ANS:<br />
21.7 m/s<br />
<strong>11</strong>-2.3<br />
7. ANS:<br />
3.5 10 W/m<br />
OBJ: <strong>12</strong>-2.1<br />
8. ANS:<br />
5.4 m<br />
OBJ: <strong>12</strong>-2.1<br />
9. ANS:<br />
0.340 m<br />
OBJ: <strong>12</strong>-3.2<br />
10. ANS:<br />
0.179 m<br />
OBJ: <strong>12</strong>-3.2<br />
<strong>11</strong>. ANS:<br />
527 Hz or 545 Hz<br />
OBJ: <strong>12</strong>-3.4
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