本题目来源于试卷: Gravity and Planetary Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
06.50: A rocket is in l2u n1stcxn(n:71dwm a circular o v,ca+l1m;,avvdd k-;xo dp8+5hivtorbit with 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-major axis a of this new ellip1mv 8c v ,;ddakltdp,-o ;x5+h vv+oaitical 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
| 
