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A body of mass 5 kg is placed at the ori...

A body of mass 5 kg is placed at the origin. It can move only on the x-axis. A force of 10 N is acting on it in a direction making an angle of `60^@` with the x-axis and displaces it along the-x-axis by 4 metre. The work done by the force is

A

`2.5 J`

B

`7.25 J`

C

`40 J`

D

`20 J`

Text Solution

Verified by Experts

The correct Answer is:
D
Workdone = Force `xx` displacement along force direction
`W = F . x . cos theta = 10 xx 4 xx cos 60^@ = 20 J`
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