题目
题目

国际科学 1A MS-ESS1-2：太阳系和银河系中的引力和运动 - 测验 2

单项选择题

低地球轨道上的一颗卫星短暂启动推进器，以提高其沿路径的速度。从定性角度来看，它的轨道会发生什么变化？

选项
A.它停止轨道运行并飞向深空。
B.什么都没有改变，因为重力抵消了推力。
C.由于速度更快，它会下降到较低的轨道。
D.它移动到更高的轨道，因为额外的速度使它能够克服重力而远离地球。
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标准答案
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思路分析
题目给出的是低地球轨道(LEO)的一颗卫星在轨道上短暂启动推进器以提高沿路径的速度的定性分析。 选项逐一分析如下： 选项1：它停止轨道运行并飞向深空。此说法错误。简单的瞬时推力增速并不会让卫星突然摆脱地球引力并直线飞向深空。卫星在做圆轨道或椭圆轨道插入时，推进器......Login to view full explanation

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