First slide

Applications of SHM

Question

A simple pendulum has a bob which is a hollow sphere full of sand and oscillates with certain period. If all that sand is drained out through a hole at its bottom, then its period

Moderate

A

Increases
B

Decreases
C

Remains the same
D

Is zero

Solution

During the draining of the sand, the period first increases due to change in effective length, then decreases and finally attains a value that it had when the sphere was full of sand.

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