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Q.

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:- 

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a

remain constant 

b

first decreases and then increases 

c

first increases, then decrease 

d

Increase continuously 

answer is C.

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Detailed Solution

Question Image

Initially as ant move towards axis I decreases so ω increases. 

After crossing axis I increases and ω decreases. 

so, first ω increases then ω decreases. 

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