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A body of mass 6 kg is under a force whi...

A body of mass 6 kg is under a force which causes displacement in it given by `s=t^(2)/4` metre where t is time. The work done by the force in 2 s is

A

12J

B

9J

C

6J

D

3J

Text Solution

Verified by Experts

The correct Answer is:
D
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The displacement of a body of mass 2 kg varies with time.t. as S =t^(2) + 2t , where S is in metres and .t.is in seconds. The work done by all the foces acting on the body during the time interval t = 2s to t = 4s is