Suppose the mass of a loaded elevator is 1700 KG. (A) what force, in newtons, must be supplied by the elevators cable to produce an acceleration of 0.82 m/s^2 upwards against 210-N frictional force? (B) how much work, joules, is done by the cable and lifting the elevator 18 M? (C) what is the final speed, in meters per second, of the elevator if it starts from rest? (D) how much work in kilojoules, went into thermal energy produced by friction? 

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter8: Potential Energy And Conservation Of Energy
Section: Chapter Questions
Problem 70AP: A particle of mass 2.0 kg moves under the influence of the force F(x)=(5x2=7x)N . Suppose a...
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Suppose the mass of a loaded elevator is 1700 KG. (A) what force, in newtons, must be supplied by the elevators cable to produce an acceleration of 0.82 m/s^2 upwards against 210-N frictional force? (B) how much work, joules, is done by the cable and lifting the elevator 18 M? (C) what is the final speed, in meters per second, of the elevator if it starts from rest? (D) how much work in kilojoules, went into thermal energy produced by friction? 
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