A tow truck pulls a car 5.00 km along a horizontal roadway using a cable having a

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A tow truck pulls a car 5.00 km along a horizontal roadway using a cable having a tension of 850 N.
(a) How much work does the cable do on the car if it pulls horizontally? If it pulls at 35.0o above the horizontal?
(b) How much work does the cable do on the tow truck in both cases of part (a)?
(c) How much work does gravity do on the car in part (a)?
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Physics

ISBN: 978-0077339685

2nd edition

Authors: Alan Giambattista, Betty Richardson, Robert Richardson

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