If a pendulum is oscillating with a frequency f then what is the frequency at which its K.E. changes is:
Correct answer: A. 2f
- A. 2f
- B. f/2
- C. f
- D. None of these
Explanation
Frequency is defined as the number of oscillations or the number of wiggles per unit time. Kinetic energy changes twice in one oscillation, which means that if the pendulum oscillates f times in one second, the KE will oscillated 2f times in the same time. Hence, the frequency of kinetic energy becomes 2f.
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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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