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AP EAMCET202124 Aug 2021Morning ShiftPhysicsOscillationsActual

A simple pendulum is vibrating in an evacuated chamber. It will oscillate with

Options

  1. Aconstant amplitude
  2. Bdecreasing amplitude
  3. Cincreasing amplitude
  4. Damplitude, the variation of which cannot be predicted

Correct answer

A. constant amplitude

Step-by-step solution

Since, the amplitude of simple pendulum depends on the net force acting on bob. As, in the vacuum, no external air dragging force acts on bob other than gravity. That's why amplitude remains constant in vacuum.

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