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Unformatted text preview: A to B . ______ 143 J _________ (b) Find the work done by gravity on the block from A to B . _______ 216 J _________ (c) Find the work done by friction on the block from A to B . _______ 137 J ___________ (d) Find the work done by the spring on the block from A to B . _______ 132 J __________ 30 B 0.7 m 1.8 m F A 2. Automotive power (a) If 12 kW power is required to drive a 1500 Kg car at a constant speed of 25 m/s on a level road, what is the total retarding force (friction, air resistance, and so on) on the car? _________ 480 N __________ (b) What power (in kW) is required to drive the same car at a constant speed of 25 m/s up a 10% grade? ________ 48.6 kW _________...
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 Spring '08
 TSChang
 Physics, Work

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