Answer:
24.72 kwh
Explanation:
Electric energy=potential energy=mgz where m is mass, g is acceleration due to gravity and z is the elevation.
Substituting the given values while taking g as 9.81 and dividing by 3600 to convert to per hour we obtain
PE=(108*9.81*84)/3600=24.72 kWh
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The distance from Point A=500 mm
Explanation:
M := 40kg c := 200mm
μs := 0.3 d := 3
a := 400mm e := 4
b := 800mm
Initial guesses: 
:= 200 N P := 50N
Plz refer to the image below
