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A solid sphere and a spherical shell rol...

A solid sphere and a spherical shell roll down an incline from rest from same height. The ratio of times taken by them is

A

`sqrt(21/25)`

B

`21/25`

C

`sqrt(25/21)`

D

`25/21`

Text Solution

Verified by Experts

The correct Answer is:
A
`t=(sqrt(2l(1+(k^(2))/(R^(2)))))/(g sin theta)`
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