本题目来源于试卷: Fields D.1 Gravitational Fields & Potential ，类别为 IB物理学
[单选题]
Spaceship A orbits Earth with ;i vuqkxj( )1j r6rk+iorbitacqr)ri-ii9fk +x3l4g-j k ( n3yhpi( pl speed $v_A$ and orbital radius $r$. Spaceship B orbits planet X that has a mass twice that of the earth.
What will be the orbital speed of spaceship B if it were to have the same orbital radius as spaceship A?
A. $\frac{v_A}{2}$
B. $\frac{v_A}{\sqrt{2}}$
C. $\sqrt{2}v_A$
D. $2v_A$
参考答案: C
本题详细解析:
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