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A disc in which serval grooves are cut a...

A disc in which serval 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

A.Maximum in groove AB

B

B.Maximum in groove AD

C

C.Same in all groove

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
Using `s=ut+(1)/(2)at^(2)`
`2r cos theta=0+(1)/(2)g cos thetat^(2)`
`t=sqrt((4r)/(g))=` constant
which does not depend upon `theta`
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