University Physics with Modern Physics with Mastering Physics (11th Edition)

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10.78: a) The kinetic energy of the ball when it leaves the tract (when it is still rolling without slipping) is ) 10 7 ( 2 mv and this must be the work done by gravity, W = mgh, so . 7 10 gh v = The ball is in the air for a time . 7 20 so , 2 hy vt x g y t = = = b) The answer does not depend on
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Unformatted text preview: g , so the result should be the same on the moon. c) The presence of rolling friction would decrease the distance. d) For the dollar coin, modeled as a uniform disc, . 3 8 so and , ) 4 3 ( 2 hy x mv K = =...
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