alleryA solid cylinder and a hollow cylinder of same mass and radius roll down an incline. Which reaches bottom first?
ASolid (smaller I, more KE goes to translation)
BHollow
CNeither moves
DBoth together
Answer & Solution
Correct answer: A. Solid (smaller I, more KE goes to translation)
Solid cylinder has I = MR²/2 (smaller); hollow has I = MR².
Lower I means less rotational KE share, more translational KE, so faster.
Solid cylinder reaches bottom first.
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