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**Unformatted text preview: **Homework for Chapter 6.4: Work and Energy For the problems that involve a little bit of numeric computation, feel free to use Excel or some other similar program. As before, you need only turn in the problems that have no answer in the back of the book. Drill problems: 1: work to lift a 40-kg sandbag to a height of 1.5 meters 6: work from a table of numbers; use the midpoint rule with n=4. 20: empty a circular pool Applied problems: 29: Newton's law of gravitation 30: launch a satellite Supplement to Problem 30: convert your answer from Joules to kiloWatt-hours (1 kW-h is 3.6 megaJoules), and give the cost if you could use electric power to do the launch (at $0.10 per kW-h). Compare to the actual cost using rockets: about $10000 per kilogram.--------------------------------------------------------- Only _one_ of the following questions needs calculus! They are mostly to help you get a feel for various energy quantities.--------------------------------------------------------- Question A: The PlayPump is a system that brings up water from a well and puts it into a water tower. It is powered by kids playing on a merry-go-round....

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