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A block of mass 2 kg is released from re...

A block of mass `2 kg` is released from rest on a rough inclined ground as shown in figure. Find the work done on the block by.
.
(Take `g 10 m//s^(2)`).

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
`W_(mg) =(mg)(S) cos 30^@`
`=(20)(2)(sqrt(3//2))`
`=34.6 J`
.
(b) `W_fS cos180^@`
`=(mumg cos theta) (S) (-1)`

`=-(1/2) (20) (cos 60^@) (2)`
`=-10 J`.
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