在学完“万有引力定律”一章时,经常会看到这样一道题:一颗人造地球卫星在天空中运行,若开动卫星上的小型发动机,使卫星的速度减小,卫星将怎样运动,很多学生会不假思索的运用公式得出结论:当v减小时,R将增大,因此得出卫星的运动半径将增大的错误结论. After learning the chapter “Theory of Gravitation”, we often see such a problem: An artificial earth satellite is operating in the sky. If a small engine on a satellite is started, the speed of the satellite will be reduced and how the satellite will move. Many students will The use of formulas without any reflection leads to the conclusion that when v decreases, R will increase, and therefore it will lead to the erroneous conclusion that the radius of motion of the satellite will increase.