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 :

`8J`

`-8J`

`4J`

`-4J`

Text Solution

Verified by Experts

The correct Answer is:

`(2)`

`W_(friction) = K.E _(f) - P.E_(i)`

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