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COMEDK2016PhysicsMotion in One Dimension

A simple pendulum has a period T inside a lift, when it is stationary. The lift is accelerated upwards with constant acceleration a . The period

Options

  1. Adecreases
  2. Bincreases
  3. Cremains same
  4. Dbecomes infinite

Correct answer

A. decreases

Step-by-step solution

The time period of a pendulum is given by T= 1 2 l g When a lift containing a simple pendulum is accelerated upwards with acceleration a , then its time period becomes T^ = 1 2 l (g+a) Clearly, T^ T Hence, its time period decreases.

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