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BITSAT2021PhysicsOscillationsActual

In a simple pendulum of length I the bob is pulled aside from its equilibrium position through an angle and then released. The bob passes through the equilibrium position with speed

Options

  1. A2 g l(1+ )
  2. B2 g l
  3. C2 ~g l
  4. D2 ~g l(1- )

Correct answer

D. 2 ~g l(1- )

Step-by-step solution

If l is length of pendulum and be angular amplitude then from principle of conservation of energy (Initial total energy) 0+ mgh = 1 2 m v²+0 (Final total energy) v= 2 g h = 2 g l(1- )

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