ch07-p054 - 54. (a) The compression of the spring is d =...

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which (choosing the positive root) leads to ′ = ++ d mg m g mkv k i 22 2 which yields d ´ = 0.23 m. In order to obtain this result, we have used more digits in our intermediate results than are shown above (so 12.048 m/s 3.471 m/s i v == and ' i v = 6.942 m/s). 54. (a) The compression of the spring is d = 0.12 m. The work done by the force of gravity (acting on the block) is, by Eq. 7-12, Wm g d 1 025 029 = (. . kg) 9.8 m / s (0.12 m) J. 2 c h (b) The work done by the spring is, by Eq. 7-26, Wk d 2 2 1 2 1 2 250 18 =− N / m) (0.12 m) J.
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This note was uploaded on 03/19/2010 for the course PHYSICS 191262 taught by Professor Najafzadeh during the Spring '09 term at The Petroleum Institute.

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