The frequency of the second pendulum is________________?
Correct answer: B. 0.5 hertz
- A. 1 hertz
- B. 0.5 hertz
- C. 1.5 hertz
- D. 2.5 hertz
Explanation
A second pendulum has time period T = 2 s by definition. Its frequency is f = 1/T = 1/2 s = 0.5 s^-1 = 0.5 Hz. Students may choose a by confusing the numerical value of frequency with the period, but frequency and period are reciprocals.
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About Simple Harmonic Motion
Simple harmonic motion is oscillation in which acceleration is directly proportional to displacement and directed toward the equilibrium position. Work includes displacement, velocity, acceleration, phase, period, frequency, amplitude and energy, with applications to springs and simple pendulums. The restoring force and the conditions for SHM distinguish it from general periodic motion.
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