9709 P41 - Jun 2011 - Q2
3474
A load of mass 1250 kg is raised by a crane from rest on horizontal ground, to rest at a height of 1.54 m above the ground. The work done against the resistance to motion is 5750 J.
- Find the work done by the crane.
- Assuming the power output of the crane is constant and equal to 1.25 kW, find the time taken to raise the load.
