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A body of mass 2 kg is kept on a rough h...

A body of mass `2 kg` is kept on a rough horizontal surface as shown in the figure. Find the work done by frictional force in the interval `t=0` to `t=5 sec`

A

zero

B

`+15J`

C

`-20J`

D

data insufficient

Text Solution

Verified by Experts

The correct Answer is:
A
`:' 10cos30^(@)ltmuN`
`:.` Block does not start
`rArr` Work done by fricitional force is zero
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