Q.

Two identical hollow spheres roll down two inclined planes of same height but of different angles of inclination. Then, they reach the bottom

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a

with same speeds and in same time

b

with different speeds and in different times

c

with same speed but in different times

d

with different speeds in same times

answer is C.

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Detailed Solution

time of travel  t=2sa=  2 Lg sinθ1+k2R2 and  v =2 g h1+k2R2
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