Much of the time and expense in drilling an oil well goes into changing the drill bit as it wears out. The drilling pipe must be pulled up and disassembled one section at a time in order to pull the drill bit out of the hole and replace it. A pipe 0.65 miles long weighs 2,4001b. It takes the pulling works 7.5 s to lift this pipe 20 ft, the height of one section, in order to disassemble it A. How much work is done in lifting the pipe the length of one section? B. What is the power delivered by pulling in horsepower?

Much of the time and expense in drilling an oil well goes into changing the drill bit as it wears out. The drilling pipe must be pulled up and disassembled one section at a time in order to pull the drill bit out of the hole and replace it. A pipe 0.65 miles long weighs 2,4001b. It takes the pulling works 7.5 s to lift this pipe 20 ft, the height of one section, in order to disassemble it A. How much work is done in lifting the pipe the length of one section? B. What is the power delivered by pulling in horsepower?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section: Chapter Questions

Problem 90A

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