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56. A solid sphere rolls down an inclined plane and its velocity at the

A solid sphere rolls down an inclined plane and its velocity at the bottom is v1. Then same sphere slides down the plane (without friction) and let its velocity at the bottom be v2. Which of the following relation is correct

(a)    v1 = v2

(b)    v1 = 5/7v2

(c)     v1 = 7/5 v2

(d)    None of these

Ans. d

(13)

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