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Question

A block reaches the foot of a smooth inclined plane by slipping down with speed V. Now, if a disc of same mass as the block is released from same height, then its speed when it reaches the foot of the same plane will be

A
2V3
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B
V
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C
V2
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D
V2
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Solution

The correct option is B V
Disc will not roll since there is no friction. So, it will follow translatory motion and loss in PE = gain in KE

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