(i)[3]
Find the work done by the crane during the lift.
(ii)[2]
Find the time taken to raise the load, assuming the crane has a constant power output of $1.25\,\text{kW}$.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A crane lifts a load with mass $1250\,\text{kg}$ from rest on level ground to rest at a height of $1.54\,\text{m}$ above the ground. The work done in overcoming resistance to motion is $5750\,\text{J}$.