Answer:592 kJ
Explanation:
Given
mass of elevator m=1500 kg
Lifting height=40 m
Friction Force F=100 N
The cable has to work against gravitational force and friction Force
Increase in Potential Energy of Elevator[tex]=mg h=1500\times 9.8\times 40=588 kJ[/tex]
thus work done by gravitational force[tex]=588 kJ[/tex]
Work done against friction force[tex]=F\cdot x=100\cdot 40=4 kJ[/tex]
Total Work done by the cable[tex]=592 kJ[/tex]
