HH_Sec_8_5 - he has rolled it s feet. How much work does he...

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(9/30/08) Math 10B. Lecture Examples. Section 8.5. Applications to physics Example 1 A man sliding a box exerts a force of 20 - 3 s pounds when the box is at s (feet) on an s -axis. How much work does he do when he moves the box from s = 0 to s = 9 ? Answer: [Work] = 126 foot-pounds Example 2 A woman pushing her stalled car exerts a force of 400 ( 1 + s ) - 1 / 2 newtons on it when she has pushed it s meters. The engine starts and she stops pushing it when she has pushed 24 meters. How much work does she do pushing the car? Answer: [Work] = 3200 newton-meters (joules) Example 3 A boy rolling a large boulder exerts 10 + 5 sin s pounds of force on it when
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Unformatted text preview: he has rolled it s feet. How much work does he do in rolling it 30 feet? Answer: [Work] = 305-5 cos(30) . = 304 . 23 foot-pounds Interactive Examples Work the following Interactive Examples on Shenks web page, http//www.math.ucsd.edu/ashenk/: Section 7.9: Examples 14 Lecture notes to accompany Section 8.5 of Calculus by Hughes-Hallett et al The chapter and section numbers on Shenks web site refer to his calculus manuscript and not to the chapters and sections of the textbook for the course. 1...
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This note was uploaded on 09/13/2010 for the course MATH math 10b taught by Professor Reed during the Summer '10 term at UCSD.

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