A bucket that weighs 4 lb and a rope of negligible weight are used to draw water from a well that is 80 ft deep. The bucket is filled with 40 lb of water and is pulled up at a rate of 2 ft/s, but water leaks out of a hole in the bucket at a rate of 0.2 lb/s. Find the work done in pulling the bucket to the top of the well.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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5.4 Problem #18

Show how to approximate the required work by a Reimann sum. Then Express the work as an integral and evaluate it.

 

A bucket that weighs 4 lb and a rope of negligible weight are
used to draw water from a well that is 80 ft deep. The bucket
is filled with 40 lb of water and is pulled up at a rate of 2 ft/s,
but water leaks out of a hole in the bucket at a rate of 0.2 lb/s.
Find the work done in pulling the bucket to the top of the well.
Transcribed Image Text:A bucket that weighs 4 lb and a rope of negligible weight are used to draw water from a well that is 80 ft deep. The bucket is filled with 40 lb of water and is pulled up at a rate of 2 ft/s, but water leaks out of a hole in the bucket at a rate of 0.2 lb/s. Find the work done in pulling the bucket to the top of the well.
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