ier of mass 62 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 45 m up a 30° slope (assumed frictionless) at a constant speed of 2.1 m/s? 2.70e4 Your response differs from the correct answer by more than 10%. Double check your calculations. J (b) What power must a motor have to perform this task? 1260.65 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. hp Need Help? Read It

ier of mass 62 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 45 m up a 30° slope (assumed frictionless) at a constant speed of 2.1 m/s? 2.70e4 Your response differs from the correct answer by more than 10%. Double check your calculations. J (b) What power must a motor have to perform this task? 1260.65 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. hp Need Help? Read It

Name: A skier of mass 62 kg is pulled up a slope by a motor-driven cable.(a
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Description: A skier of mass 62 kg is pulled up a slope by a motor-driven cable.(a) How much work is required to pull him 45 m up a 30° slope (assumed frictionless) at a constant speed of 2.1 m/s?2.70e4Your response differs from the correct answer by more than 1

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 30P: Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.00...

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A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people ‘would it take to nm a 4.O0-kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 800 MW?
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A 6.50 102-kg elevator starts from rest and moves upward for 3.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this amount of power compare with its power during an upward trip with constant speed?
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