Power and energy transfer
:eek: A loaded ore car has a mass of 950kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected with a winch. The shaft is inclined at 30.0 degrees above the horizontal. The car accelerates uniformly to a speed of 2.20m/s in 12.0 seconds and then continues at constant speed. What power must the winch provide when the car is moving at a constant speed? What maximum power must the motor provide? What total energy transfers out of the motor by work by the time the car moves off the end of the track, which is a length of 1,250m?
