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The Principle

An ant is sit...

Question

An ant is sitting at the edge of a rotating disc. If the ant reaches the other end, after moving along the diameter, the angular velocity of the disc will?

A

Remain constant

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B

First decreases and then increases

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C

First increases, then decrease

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D

Increase continuously

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Solution

The correct option is D First increases, then decrease
Answer C : First increases, then decrease
From the angular momentum conservation about the vertical axis passing through center. When the ant is coming from circumference to center. Moment of inertia first decreases then increases. So angular velocity increases than decrease.

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