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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:
`-8`
Work done by friction = `E_f - E_i`
`= 1/2 xx 1 xx (2)^2 - 1 xx 10 xx 1 = -8 J`.
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