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

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6.18: As the example explains, the boats have the same kinetic energy K at the finish line, so 2 2 ) 2 / 1 ( ) 2 / 1 ( B B A A v m v m = , or, with 2 2 2 , 2 B A A B v v m m = = . a) Solving for the ratio of the speeds, 2 / = B A v v . b) The boats are said to start from rest, so the elapsed time is the
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Unformatted text preview: distance divided by the average speed. The ratio of the average speeds is the same as the ratio of the final speeds, so the ratio of the elapsed times is 2 / / = = B A A B v v t t ....
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This document was uploaded on 02/04/2008.

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