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 circul-u (2 amvsf.wkar orbit with speed vand orbital radius Ry1 k iddbk.x *tv64h+6b 9;hrpzx5dov around a heavy stationary mass. An external impulse is quickly applied to the rocket directly opposi.y5d 1k6iodzxv hb4;9+6 xdvt*bpkrh te 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-major axis a of this new elliptical orbit is
A. $a = 1/4 R$
B. $a = 1/2 R$
C. $ a = 4/7 R$
D. $a = 7/11 R$
E. $a =\frac{\sqrt{8}}{3}R$
参考答案: C
本题详细解析:
暂无
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