ch08-p028 - 28. We take the original height of the box to...

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28. We take the original height of the box to be the y = 0 reference level and observe that, in general, the height of the box (when the box has moved a distance d downhill) is sin 40 yd =− ° . (a) Using the conservation of energy, we have K U K U mv mgy kd ii += + ¡ + + 00 1 2 1 2 22 . Therefore, with d = 0.10 m, we obtain v = 0.81 m/s. (b) We look for a value of d 0 such that K = 0. KU KU m g y k d + ¡ +=+ + 000 1 2 2 . Thus, we obtain mgd kd sin 40
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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