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

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12.62: a) The total gravitational potential energy in this model is - + - = EM M E r R m r m Gm U b) See Exercise 12.5. The point where the net gravitational field vanishes is m. 10 46 . 3 1 8 E M EM × = + = m m R r Using this value for r in the expression in part (a) and the work-energy theorem, including the initial potential energy of
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Unformatted text preview: )) ( ( E EM M E E R R m R m Gm-+-gives s. km 1 . 11 c) The final distance from the earth is not M R , but the Earth-moon distance minus the radius of the moon, or m. 10 823 . 3 8 × From the work-energy theorem, the rocket impacts the moon with a speed of s. km 9 . 2...
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