Power Physics

The 100 kg box shown below is being pulled along the x-axis by a student. The box slides across a rough surface, and its position ##x## varies with time ##t## according to the equation ##x = 0.5t^3 + 2t## , where ##x## is in meters and ##t## is in seconds.
C. Calculate the net work done on the box in the interval ##t## = 0 to ##t## = 2 s would be greater than, less than, or equal to the answer in part (C). Justify your answer.