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In both the figures, all other factors a...

In both the figures, all other factors are same, except that in figure (i) AB is sufficiently rough and BC is smooth while in figure (ii) AB is smooth and BC is sufficiently rough. Kinetic energy of the ball on reaching the bottom:

A

is same in both the cases

B

is greater in case (I)

C

is greater in case (II)

D

information insufficient

Text Solution

Verified by Experts

The correct Answer is:
B
In case (i) work done by friction is zero, while in case (ii) it is non-zero as it will forward slip (for some time) on BC.
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