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

A block of mass `1kg` slides down a curved track which forms one quadrant of a circle of radius `1m` as shown in figure. The speed of block at the bottom of track is `v=2 ms^(-1)`. The work done by the of friction is
.

Text Solution

Verified by Experts

The correct Answer is:
B
`mg1+w_(fk)=(1)/(2)(1)2^(2)-0`
`w_(fk)=2-10`
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