238_Dynamics 11ed Manual

238_Dynamics 11ed Manual - Engineering Mechanics Dynamics G...

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Engineering Mechanics - Dynamics Chapter 13 G 6.673 10 11 × N m 2 kg 2 = Solution: Central - Force motion: r a r 0 2 GM r 0 v 0 2 1 = b a 2 GkM e () av p 2 1 = v p 2 e b aa b + = v p 7.472 km s = Problem 13-122 The rocket is traveling in free flight along an elliptical trajectory A'A .The planet has no atmosphere, and its mass is k times that of the earth’s. The rocket has an apoapsis and periapsis as shown in the figure. If the rocket is to land on the surface of the planet, determine the required free-flight speed it must have at A' so that it strikes the planet at
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