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A disc in which several grooves are cut ...

A disc in which several grooves are cut along the chord drawn from a point 'A', is arranged in a vertical plane, several particles starts slipping from 'A' along the grooves simultaneously. Assuming friction and resistance negligible, the time taken in reaching the edge of disc will be:-

A

Maximum in groove AB

B

Maximum in groove AD

C

Same in all groove

D

According to the heights of B, C, D E, F

Text Solution

Verified by Experts

The correct Answer is:
C
Time to fall `=sqrt((2xx2R cos theta)/(g cos theta))`
so it does not depends on `theta` i.e. the chord position.
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