如图所示，从地面上A点发射一枚远程弹道导弹，在引力作用下，沿

更新 2022-09-03
科目物理
题型选择题
难度中等
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挑错有奖

如图所示，从地面上A点发射一枚远程弹道导弹，在引力作用下，沿ACB椭圆轨道飞行击中地面目标B，C为轨道的远地点，距地面高度为h。已知地球半径为R，地球质量为M，引力常量为G。设距地面高度为h的圆轨道上卫星运动周期为T₀。下列结论正确的是

A．导弹在C点的速度大于

B．导弹在C点的加速度等于

C．地球球心为导弹椭圆轨道的一个焦点

D．导弹从A点运动到B点的时间一定小于T₀

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