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25 Cards in this Set
- Front
- Back
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Simple Harmonic Motion is characterized by |
acceleration proportional to velocity |
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Doubling only the amplitude of a vibrating mass-and-spring system produces what effect on the system's mechanical energy? |
increases the energy by a factor of four |
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A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a maximum? |
midway between A and B |
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A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum? |
at either A or B |
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A mass swinging on the end of a massless string, as shown in Figure 13-1, undergoes SHM. Where is the instantaneous acceleration of the mass greatest? |
A and D |
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Doubling only the amplitude of a vibrating mass-on-a-spring system produces what effect on the system frequency? |
produces no change |
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When the mass of a simple pendulum is tripled, the time required for one complete vibration |
does not change |
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When the length of a simple pendulum is tripled, the time for one complete vibration increases by a factor of |
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Shown in Figure 13-2 is a graph of position vs. time for a system undergoing simple harmonic motion. Which of the other graphs represents the system's velocity as a function of time? |
graph b |
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Simple pendulum A swings back and forth at twice the frequency of simple pendulum B. Which statement is correct? |
The length of B is (root 2) times the length of A (thrown out question, probably) |
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If you take a given pendulum to the moon, where the acceleration of gravity is less than on Earth, the resonant frequency of the pendulum will |
decrease |
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Consider the wave shown in Figure 13-4. The amplitude is |
4 m. |
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The wavelength in Figure 13-5 |
cannot be determined from the given information |
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What is the amplitude (in meters) of a wave whose displacement is given by |
.50 m |
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Which part of a vibrating string experiences the maximum acceleration? |
antinodes |
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A 2.0 kg mass is attached to the end of a horizontal spring (k=50. N/m) and set into simple harmonic motion with an amplitude of 10. cm. What is the total mechanical energy of this system? |
.25 J |
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A mass is attached to a spring. It oscillates at a frequency of 4.0 Hz when displaced a distance of 2.0 cm from equilibrium and released. What is the maximum velocity attained by the mass? |
0.50 m/s |
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The mass of a mass-and-spring system is displaced 10 cm from its equilibrium position and released. A frequency of 4 Hz is observed. What frequency would be observed if the mass had been displaced only 5 cm and then released? |
4 Hz |
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A mass attached to the free end of an ideal spring executes SHM according to the equation x= 0.50 sin(18t) where x is in meters and t is in seconds. What is the maximum velocity of the mass? |
9 m/s |
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Grandfather clocks often are built so that each one-way swing of the pendulum is a second. How long is the length of a simple pendulum for a 2.00 second period? |
0.993 m |
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Waves on a lake pass under a floating bird causing the bird to bob up and down with a period of 2.5 seconds. If the distance from the wave trough to wave trough is 3.0 meters, what is the speed of the wave? |
1.2 m/s |
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The equation of motion of the wave shown in Figure 13-6 is |
y= 0.5 cos (πt) |
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A spring, fixed at both ends, vibrates at a frequency of 12. Hz with a standing transverse wave pattern as shown in Figure 13-7. What is the spring's fundamental frequency? |
4.0 Hz |
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Sound vibrations with frequencies greater than 20,000 Hz are called |
ultrasonics |
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As the temperature of the air increases, what happens to the velocity if sound? Assume that all other factors remain constant.) |
it increases |
