Waves Practice Problem Set Worksheet Page 6
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47M
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ECHANICS
RACTICE
ROBLEM
ETS
b. The frequency.
Answer: 1.34 Hz
c. The total energy.
Answer: 3.6 J
d. The kinetic energy and potential energy when x = 0.30 m.
Answer: KE=2.0 J; PE=1.6 J
7. (G21) A 25.0-g bullet strikes a 0.600-kg block attached to a fixed horizontal spring
3
whose spring constant is 6.70 x 10
N/m and sets it into vibration with an amplitude
of 21.5 cm. What was the speed of the bullet before impact if the two objects move
together after impact?
Answer: 557 m/s
8. (G29) You want to build a grandfather clock with a pendulum (a weight on the end of
a light cable) that has one second between its “tick” (swinging to) and its “tock”
(swinging fro). How long do you make the cable?
Answer: 0.993 m
9. (G30) What is the period of a simple pendulum 50 cm long on Earth?
Answer: 0.61 m
10. (G31) The length of a simple pendulum is 0.66 m, the pendulum bob has a mass of
310 grams, and it is released at an angle of 12° to the vertical.
a. With what frequency does it vibrate? Assume SHM. Answer: 0.61 Hz
b. What is the pendulum bob’s speed when it passes through the lowest point of
the swing?
Answer: 0.53 m/s
c. What is the total energy stored in this oscillation, assuming no loses?
Answer: 0.044 J
Gamzon & Gregorian-Michaelsen
6/7/16
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