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A body of mass 3 kg is under a constant ...

A body of mass `3 kg` is under a constant force which causes a displacement `s` metre in it, given by the relation `s=(1)/(3)t^(2)`, where `t` is in seconds. Work done by the force in 2 seconds is

A

`19/5` J

B

`5/19 ` J

C

`3/8 `J

D

`8/3 ` J

Text Solution

Verified by Experts

The correct Answer is:
B
W=F.S
`= m(d^(2)S)/(dt^(2)).S `
`=m xx 2/3.1/3t^(2) = 8/3 J `
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