ch13-p029 - 29. (a) The density of a uniform sphere is...

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(b) The value of a g at the surface of a planet is given by a g = GM/R 2 , so the value for Mars is () 2 24 22 23 0.65 10 km = = 0.11 9.8 m/s = 3.8 m/s . 3.45 10 km ME gg E EM MR aM a §· × ¨¸ × ©¹ (c) If v is the escape speed, then, for a particle of mass m 2 12 =. 2 mM GM mv G v R R ¡ = For Mars, the escape speed is 11 3 2 24 3 6 2(6.67 10 m /s kg) 0.11 5.98 10 kg = 5.0 10 m/s. 3.45 10 m v
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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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