Physics

Problem

2\,\text{kg}

block starts from rest on a frictionless horizontal surface and moves under a constant force that produces an acceleration of

3\,\text{m s}^{-2}

. Calculate the instantaneous power delivered to the block after

4\,\text{s}

. a)

36\,\text{W}

96\,\text{W}

72\,\text{W}

144\,\text{W}