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JEE Main202226 Jun 2022Morning ShiftPhysicsOscillationsActual

Time period of a simple pendulum in a stationary lift is T . If the lift accelerates with g 6 vertically upwards then the time period will be (Where g = acceleration due to gravity)

Options

  1. A6 5 T
  2. B5 6 T
  3. C6 7 T
  4. D7 6 T

Correct answer

C. 6 7 T

Step-by-step solution

The time period of a simple pendulum is given by   T = 2 π l g In an upward accelerating frame the effective g e f f = g + a ⇒ T 2 = 2 π l g + a = 2 π l g + g 6 T T 2 = g + g 6 g = 7 6 ⇒ T 2 = 6 7 T

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