Rankers Physics
Topic: Work Energy and Power
Subtopic: Work Done by Constant and Variable Forces

A person draws water from a 5m deep well in a bucket of mass 2 kg of capacity 8 litre by a rope of mass 1 kg. What is the total work done by the person ? [g = 10 m/s2]
550 J
525 J
125 J
500 J

Solution:

Work Done in Pulling the Bucket + Rope System= 

Mgh+mg(h/2)

10×10× 5 + 1×10×(5/2) =525 J

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