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Unformatted text preview: (f) Draw a graph of the engine power P(t) vs. time t for part (e) with constant acceleration. #7.38 [Energy Graph] Please add: Suppose the marble has a mass of 0.010 kg, and the values of U(x) at points a, b, c, d, and x = are: U(a) = 0, U(b) =  6.0 mJ, U(c) = 0, U(d) = + 2.0 mJ, U( ) = 0. [NOTE: "mJ" = millijoule = 103 J] (d) If no energy is dissipated by friction, drag, etc., what minimum amount of kinetic energy would the marble need when very far away (x = + ) and heading towards O in order for it to be able to reach point b? How much kinetic energy would it then have at point b? (e) What would be the marble's speeds at x = + and x = b in the previous part? (f) How much energy would need to be dissipated once the marble reaches point b in order for it to oscillate backandforth between points a and c but no further? (g) Illustrate your answers to parts (d) and (f) on the energy graph (Fig. 728) in the manner shown in Fig. 723....
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 Fall '07
 LECLAIR,A
 mechanics, Work

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