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Chapter 16 | Oscillatory Motion and Waves
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pendulum. The pendulum is placed at a location that is away from the Earth’s surface by twice the radius of the Earth. What is the acceleration due to gravity at that height and what is the period of the oscillations?
11. Which of the following gives the correct relation between the acceleration due to gravity and period of a pendulum?
a.
b.
c.
d.
12. Tom has two pendulums with him. Pendulum 1 has a ball of mass 0.1 kg attached to it and has a length of 5 m. Pendulum 2 has a ball of mass 0.5 kg attached to a string of length 1 m. How does mass of the ball affect the frequency of the pendulum? Which pendulum will have a higher frequency and why?
16.5 Energy and the Simple Harmonic Oscillator
13. A mass of 1 kg undergoes simple harmonic motion with amplitude of 1 m. If the period of the oscillation is 1 s, calculate the internal energy of the system.
16.6 Uniform Circular Motion and Simple Harmonic Motion
14. In the equation what values can the position take?
a. −1 to +1
b. –A to +A
c. 0
d. –ttot
16.7 Damped Harmonic Motion
15. The non-conservative damping force removes energy from a system in which form?
a. Mechanical energy
b. Electrical energy
c. Thermal energy
d. None of the above
16. The time rate of change of mechanical energy for a damped oscillator is always:
a. 0
b. Negative c. Positive d. Undefined
17. A 0.5-kg object is connected to a spring that undergoes oscillatory motion. There is friction between the object and the surface it is kept on given by coefficient of friction
. If the object is released 0.2 m from equilibrium, what is the distance that the object travels? Given that the
force constant of the spring is 50 N m-1 and the frictional force between the objects is 0.294 N.
16.8 Forced Oscillations and Resonance
18. How is constant amplitude sustained in forced oscillations?
16.9 Waves
19. What is the difference between the waves coming from a tuning fork and electromagnetic waves?
20. Represent longitudinal and transverse waves in a graphical form.
21. Why is the sound produced by a tambourine different from that produced by drums?
22. A transverse wave is traveling left to right. Which of the following is correct about the motion of particles in the wave? a. The particles move up and down when the wave travels
in a vacuum.
b. The particles move left and right when the wave travels
in a medium.
c. The particles move up and down when the wave travels
in a medium.
d. The particles move right and left when the wave travels
in a vacuum.
23.
Figure 16.51 The graph shows propagation of a mechanical wave. What is the wavelength of this wave?
16.10 Superposition and Interference
24. A guitar string has a number of frequencies at which it vibrates naturally. Which of the following is true in this context?
a. The resonant frequencies of the string are integer multiples of fundamental frequencies.
b. The resonant frequencies of the string are not integer multiples of fundamental frequencies.
c. They have harmonic overtones.
d. None of the above
25. Explain the principle of superposition with figures that show the changes in the wave amplitude.
26. In this figure which points represent the points of constructive interference?
Figure 16.52
a. A, B, F
b. A, B, C, D, E, F c. A, C, D, E
d. A, B, D
27. A string is fixed on both sides. It is snapped from both