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近地卫星和同步卫星

> 一颗人造卫星在绕地球做匀速圆周运动，其轨道半径为地球半径的 2 倍，则该卫星做匀速圆周运动的速度 A．一定等于 7 . 9km / s B．一定小于 7 . 9km/s C．一定大于 7 . 9 km / s D．介于 7 . 9 km/s～11. 2 km / s

问题：

发布时间：2024-09-11

一颗人造卫星在绕地球做匀速圆周运动，其轨道半径为地球半径的 2 倍，则该卫星做匀速圆周运动的速度

A．一定等于 7 . 9km / s B．一定小于 7 . 9km/s

C．一定大于 7 . 9 km / s D．介于 7 . 9 km/s～11. 2 km / s

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