Question

A load of mass 120kg is raised

vertically through a height of 2m in
30s by a machine whose efficiency,
is 100% Calculate the power generated
by the machine​

Answer 1

Answer: P = 120 kg·9.81 m/s² · 2 m / 30 s = 78 W

Explanation: power P = Work done / time

Work is lifting work = mgh in which g = 9.81 m/s²

Time 30 s