Physics

Problem

A machine lifts boxes in two stages of a single operation. In stage 1 it does

3000\,\text{J}

of work in

5\,\text{s}

, and in stage 2 it does

2000\,\text{J}

of work in

3\,\text{s}

. What is the machine’s average power for the entire operation? a)

500\,\text{W}

633\,\text{W}

625\,\text{W}

1267\,\text{W}