A loaded ore car has a mass of 900 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 23.0° above the horizontal. The car accelerates uniformly to a speed of 2.20 m/s in 11.5 s and then continues at constant speed. What power must the winch motor provide when the car is moving at constant speed????
Shane Macguire , 10 Years ago
Grade upto college level