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 = 2 s to t = 4 s is

The displacement of a body of mass 2 kg varies with time .t. as S =t^(

1.	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 = 2 s to t = 4 s is
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