论文部分内容阅读
对于高中学生来说,天体运动的问题由于涉及圆周运动、万有引力及功能关系等问题,其中变量较多,因而给他们带来了不小的困惑。下面分类说明。一、轨道越高发射越困难例1:关于绕地球做匀速圆周运动的人造卫星的发射,下列说法正确的是(%%%%)A.卫星的轨道半径越大,其线速度越小,动能越小,因此发射越容易。B.卫星的轨道半径越大,其线速度越大,动能越大,因此
For high school students, the problem of celestial movement involves many problems such as circular motions, gravitation and functional relationships, among which there are more variables, thus bringing them no small confusion. The following classification description. First, the more difficult the launch of the orbit Example 1: On the Earth to do uniform circular motion of the satellite launch, the following statement is correct (%%%%) A. Satellite orbit radius is larger, the smaller the linear velocity, The smaller the kinetic energy, the easier it is to launch. B. The larger the orbital radius of a satellite, the greater the linear velocity and the greater the kinetic energy