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Q.

A metallic rod is rotating on a frictionless horizontal plane about an axis passing through one of its end, If the angular velocity is doubled

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a

there will be no elongation in any case

b

elongation in rod will remain same

c

elongation in rod becomes two times of initial value

d

elongation in rod becomes four times of initial value

answer is D.

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Detailed Solution

Tension at any point is dependent on square of angular velocity.
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