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This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise 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 30.7° above the horizontal. The car accelerates uniformly to a speed of 2.32 m/s in 13.7 s and then continues at constant speed. (a) What power must the winch motor provide when the car is moving at constant speed? (b) What maximum power must the motor provide? (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? Step 1 (a) When the car is being towed up the incline at constant speed, the tension F in the cable is equal to the component the force down the incline due to the weight of the loaded car. F = mgsine Let v be the car's constant speed and m the mass of the car. The power P input from the motor is P=Fv = mgvsine =1 kg) (9.80 m/s²)( x 10 W = kW. m/s) (sin

This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise 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 30.7° above the horizontal. The car accelerates uniformly to a speed of 2.32 m/s in 13.7 s and then continues at constant speed. (a) What power must the winch motor provide when the car is moving at constant speed? (b) What maximum power must the motor provide? (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? Step 1 (a) When the car is being towed up the incline at constant speed, the tension F in the cable is equal to the component the force down the incline due to the weight of the loaded car. F = mgsine Let v be the car's constant speed and m the mass of the car. The power P input from the motor is P=Fv = mgvsine =1 kg) (9.80 m/s²)( x 10 W = kW. m/s) (sin

Physics for Scientists and Engineers, Technology Update (No access codes included)
Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter3: Vectors
Section: Chapter Questions
Problem 3.4OQ: The culling tool on a lathe is given two displacements, one of magnitude 4 cm and one of magnitude 3...
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This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise 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 30.7° above the horizontal. The car accelerates uniformly to a speed of 2.32 m/s in 13.7 s and then continues at constant speed. (a) What power must the winch motor provide when the car is moving constant speed? (b) What maximum power must the motor provide? (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? Step 1 (a) When the car is being towed up the incline at constant speed, the tension F in the cable equal to the component of the force down the incline due to the weight of the loaded car. F = mgsine Let v be the car's constant speed and m the mass of the car. The power P input from the motor is P=Fv = mgvsing =1 kg) (9.80 m/s²) x 104 W = Submit Skip (you cannot come back) kW. m/s) (sin 1.)
Transcribed Image Text:This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise 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 30.7° above the horizontal. The car accelerates uniformly to a speed of 2.32 m/s in 13.7 s and then continues at constant speed. (a) What power must the winch motor provide when the car is moving constant speed? (b) What maximum power must the motor provide? (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? Step 1 (a) When the car is being towed up the incline at constant speed, the tension F in the cable equal to the component of the force down the incline due to the weight of the loaded car. F = mgsine Let v be the car's constant speed and m the mass of the car. The power P input from the motor is P=Fv = mgvsing =1 kg) (9.80 m/s²) x 104 W = Submit Skip (you cannot come back) kW. m/s) (sin 1.)
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