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A cylinder and a ring of same mass M and...

A cylinder and a ring of same mass M and radius R are placed on the top of a rough inclined plane of inclination ` theta ` . Both are released simultaneously from the same height h.
When these bodies roll down to the foot of the inclined plane, then

A

the mechanical energy of each body is conserved

B

the velocity of centre of mass of the cylinder is `2 sqrt((gh)/(3))`

C

the velocity of centre of mass of the ring is `sqrt(gh)`

D

the velocity of centre of mass of each body is `sqrt(2 gh)`

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The correct Answer is:
A, B, C
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