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当卫星获得第二宇宙速度时(即v_2=11.2km/s)将挣脱地球引力束缚,飞入太阳系成为人造行星.中学物理课本中考虑到所学时学生的数学水准而未作推导,直接交待了意义及数值.现用初等数学知识推导如下,以臻读者. 现假设卫星发射到达距
When the satellite acquires the second cosmic velocity (v_2 = 11.2km / s), it will break away from the gravitational bondage of the Earth and fly into the solar system to become an artificial planet. The physics textbook for middle school takes into account the mathematics level of the students it learns without direct deduction Significance and Numerical The present primary mathematical knowledge is deduced as follows to arrive at the reader Now suppose the satellite launches a distance