A loaded ore car has a mass of 950 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 33.0° above the horizontal. The car accelerates uniformly to a speed of 2.25 m/s in 12.5 s and then continues at constant speed. (a) What power must the winch motor provide when the car is moving at constant speed? 11.73 x KW (b) What maximum power must the motor provide? 11.7 ✓ KW (c) What total energy transfers out of the motor by work by the time the car moves off the end of the track, which is of length 1,250 m? X J

A loaded ore car has a mass of 950 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 33.0° above the horizontal. The car accelerates uniformly to a speed of 2.25 m/s in 12.5 s and then continues at constant speed. (a) What power must the winch motor provide when the car is moving at constant speed? 11.73 x KW (b) What maximum power must the motor provide? 11.7 ✓ KW (c) What total energy transfers out of the motor by work by the time the car moves off the end of the track, which is of length 1,250 m? X J

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Conservation Of Energy

Section: Chapter Questions

Problem 41P: A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from...

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A loaded ore car has a mass of 950 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 30.0 above the horizontal The car accelerates uniformly to a speed of 2.20 m/s in 12.0 s and then continues at constant speed. What maximum power must the winch motor provides?