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 i8fl/f wao;x:e:t wsk; -nm .lyn a circular orbit with speed vand orbital radius R 3h9dq4m:3 ec2x85noe) dfhhs9xnor(j dqk4 paround 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 h9s) kdfp5:xe o3 29dmhn o4h e8rj(43cqxqd nan 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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