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A sphere of mass m and rdius r is releas...

A sphere of mass m and rdius r is released from rest at point A on a track in vertical plane. The track is rough enough to support rolling between A and B and from B onwards it is smooth. The maximum height attained by sphere from ground on its journey from B onwards is

A

H

B

`(5)/( 7) H`

C

`( 2)/( 5) H`

D

`( 2)/( 7) H`

Text Solution

Verified by Experts

The correct Answer is:
B
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