.Gravity.. (id: 16ee77b7e)

本题目来源于试卷: .Gravity..，类别为 美国物理杯赛(Physics Bowl)

[单选题]
06.50: A rocket is in a ci0gyy 0eydo;qjap 8,z0*x uk9z rcular orbit w(6 dvh3w)x+ga wq8xjzith speed vand orbital radius R around a heavy stationary mass. An external impulse is quickly applied to the rocket directly opposite to the velocity and the rocket’s speed is slowed to v/2, putting the rocket into an elliptical orbit. In terms of R, the size of the semi- +wxz)(qxgadwv8j 36hmajor axis a of this new elliptical orbit is

A. $a=1/4R$
B. $a=1/2R$
C. $a=4/7R$
D. $a=7/11R$
E. $a=\frac{\sqrt{8}}{3}R$


参考答案:  C


本题详细解析: 暂无

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