A man pulls a bucket of water from a well of depth H. if the mass of uniform rope and bucket full of water are m and M respectively. The value of work done by man is
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Answered by
213
work done = potential energy
work done to life the bucket of mass M to height h = MgH
for the rope,
centre of mass is at depth = H/2
So the change in potential energy of rope will then be= MgH/2
thus,
the answer is
MgH + MgH/2
work done to life the bucket of mass M to height h = MgH
for the rope,
centre of mass is at depth = H/2
So the change in potential energy of rope will then be= MgH/2
thus,
the answer is
MgH + MgH/2
Answered by
30
A bucket full of water mass is M
Rope mass is m
Length of the rope is l
W=Mgl+mgl/2
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