Physics

Problem

5\,\text{kg}

block starts from rest and moves on a smooth horizontal surface under a constant horizontal force such that its acceleration is

2\,\text{m/s}^2

. Calculate the instantaneous power of this force when the block has travelled

9\,\text{m}

from the start point. a)

30\,\text{W}

120\,\text{W}

60\,\text{W}

90\,\text{W}