Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter10: Work, Energy And Machines
Section10.1: Work And Energy
Problem 7PP
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Question
Suppose the mass of a loaded elevator is 1300 kg.
a) What force, in newtons, must be supplied by the elevator's cable to produce an acceleration of 0.715 m/s2 upwards against a 195-N frictional force?
b) How much work, in joules, is done by the cable in lifting the elevator 21.5 m?
c)What is the final speed, in meters per second, of the elevator if it starts from rest?
d) How much work, in joules, was converted into thermal energy by friction?
i just need part d because I keep getting the question wrong.
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