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 ?

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 ? Correct Answer Sphere

Time does not depend on mass, else

T ∞ 1 + k2R2 

 

  k2R2=> is least for 'sphere' and

 

hence least time is taken by sphere.

Bissoy MCQ

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