Work problem -- raising a chain and load

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SUMMARY

The discussion centers on calculating the work done by a winch in winding up a 40-foot chain weighing 4 pounds per foot, with an additional 600-pound load attached. The solution involves evaluating the integral \(\int_{0}^{40} 600 + 4(40-y) ~dy\), which yields a total work of 27,200 ft-lbs. The approach confirms the accuracy of the answer by considering the change in gravitational potential energy for both the chain and the load.

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Homework Statement


Consider a 40-foot chain that weighs 4 pounds per foot hanging from a winch 40 feet above ground level. Find the work done by the winch in winding up the entire chain with a 600-pound load attached to it.

Homework Equations

The Attempt at a Solution


##\displaystyle \int_{0}^{40} 600 + 4(40-y) ~dy = 27200 ## ft-lbs

Is this the correct answer?
 
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It looks correct. I get the same answer if I consider the center of mass of the load and chain and find the change in gravitational potential energy of the objects.
 
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