Two friends Sita and Gita both try to pull a bucket of water from the well by applying 35N and 45 respectively.What Is The Resultant force acting on the bucket?
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Answer:
Correct option is
A
(M+
2
m
)gh
Work done by the person is the change in potential energy of the bucket and the rope.
Given, the rope has a uniform mass m. So the center of mass for the rope is at half of the length of the rope.
So, it will be at a distance h/2 from the bottom.
Work done = Change in PE of bucket+Change in PE of rope
W=Mgh+mg
2
h
=(M+
2
m
)gh
Option A.
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