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近地卫星和同步卫星

> 设两人造地球卫星的质量比为2：1，到地球球心的距离比为1：3，则它们的( ) A．周期之比为3：1 B．线速度之比为1：3 C．向心加速度之比为1：9 D．向心力之比为18：1

问题：

发布时间：2020-03-13

设两人造地球卫星的质量比为2：1，到地球球心的距离比为1：3，则它们的( )

A．周期之比为3：1

B．线速度之比为1：3

C．向心加速度之比为1：9

D．向心力之比为18：1

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