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Questions  

A hollow cylinder and a solid cylinder of the same mass and radius are released simultaneously from rest at the top of the same inclined plane, which will reach the ground first?

a
solid cylinder
b
hollow cylinder
c
both will take the same time
d
it cannot be predicted.

detailed solution

Correct option is A

THE TIME TAKEN TO REACH THE BOTTOM IS GIVEN BY  T=2Laa = g sin θ1+IMR2, For solid cylinder I is less, so a is more, hence time taken will be less.

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