a. Calculate the work done (in J) on a 1550 kg elevator car by its cable to lift it 39.5 m at constant speed, assuming friction averages 135 N.   b. What is the work done (in J) on the lift by the gravitational force in this process?   c. What is the total work done (in J) on the lift?

University Physics Volume 1
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ISBN:9781938168277
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Chapter7: Work And Kinetic Energy
Section: Chapter Questions
Problem 25P: (a) Calculate the work done on a 1500-kg elevator car by its cable to lift it 40.0 m at constant...
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a. Calculate the work done (in J) on a 1550 kg elevator car by its cable to lift it 39.5 m at constant speed, assuming friction averages 135 N.
 
b. What is the work done (in J) on the lift by the gravitational force in this process?
 
c. What is the total work done (in J) on the lift?
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