The displacement of a body of mass 2 kg ...

The displacement of a body of mass 2 kg varies with time t as `S = t^2 + 2t`, where S is in m and t is in s. The work done by all the forces acting on the body during the time interval `t = 2 ` to `t = 4` s is

36 J

64 J

100 J

120 J

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