MHT CET Physics question

A rubber ball filled with water, having a small hole is used as the bob of a simple pendulum. The time period of such a pendulum [MHT-CET 2019]

(A)Is a constant
(B)First increases and then decreases finally having same value as at the beginningCorrect
(C)Increases with time
(D)Decreases with time

Answer: (B)

Solution

As water leaks out the centre of mass of the bob first moves down (effective length and period increase) and then moves back up when the ball is

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Question ID VK-068546