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A block of mass 1 kg slides down a verti...

A block of mass 1 kg slides down a vertical curved track that is one quadrant of a circle of radius 1m. Its speed ast the the bottom si `2 m//s`. The work done by frictional force is :

A

`4m`

B

`3m`

C

`5 m`

D

`2m`

Text Solution

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The correct Answer is:
A
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