A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?

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Time does not depend on mass, else T ∞ 1 + k 2 R 2 k 2 R 2 => is least for 'sphere' and hence least time is taken by sphere.

A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?

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