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The periodic time of a simple pendulum of length 1m & amplitude 2 cm is 5 sec. If the amplitude is made 4 cm, its periodic time in sec is:

Correct answer: B. 5

  • A. 2.5
  • B. 5
  • C. 10
  • D. 5 √2

Explanation

The value of 5 seconds matches the initial time period when the amplitude was 2 cm. Changing the amplitude to 4 cm doesn't affect the time period.

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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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