Physics

Problem

The force acting on a box varies with time. It increases uniformly from

0\,\text{N}

t = 0

60\,\text{N}

t = 3\,\text{s}

. The box moves

4.5\,\text{m}

along the direction of the force during this time. What is the average power delivered to the box in the

0

3\,\text{s}

interval? a)

30\,\text{W}

45\,\text{W}

60\,\text{W}

27\,\text{W}