Show how to approximate the required work by a Riemannsum. Then express the work as an integral and evaluate it.9. A heavy rope, 50 ft long, weighs  0 . 5 lb / ft ?and hangs overthe edge of a building 120 ft higha) How much work is done in pulling the rope to the top ofthe building?(b) How much work is done in pulling half the rope to thetop of the building?

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter65: Achievement Review—section Six
Section: Chapter Questions
Problem 51AR
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Show how to approximate the required work by a Riemann
sum. Then express the work as an integral and evaluate it.
9. A heavy rope, 50 ft long, weighs  0 . 5 lb / ft ?and hangs over
the edge of a building 120 ft higha) How much work is done in pulling the rope to the top of
the building?
(b) How much work is done in pulling half the rope to the
top of the building?

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