Question

A piano mover pushes on a piano with a force of 100 N, moving it 9 m in 12 s. With how much power does the piano mover push(in watt)?

Answer 1

Given : $F=100$ N $S=9$ m $t=12$ s

Thus work done by the force $W=FS=100\times 9=900$ J

$\therefore$ Power required $P=\frac{W}{t}=\frac{900}{12}=75$ watt