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Q.

If a solid sphere, disc and cylinder are allowed to roll down an inclined plane from the same height

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a

All will reach the bottom at the same time

b

The disc will reach the bottom first

c

The cylinder will reach the bottom first

d

The sphere will reach the bottom first

answer is C.

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Detailed Solution

detailed_solution_thumbnail

acceleration of a rolling body is  a=gsinθ1+k2R2

among the given bodies  sphere has the maximum acceleration 

Hence sphere will reach the ground first.

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