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要挣脱地球引力场束缚,飞出地球的关键是物体运动速度要快。为比较清楚地说明该问题,我们看看世界上顶尖运动员在短跑中的速度是多少?答案是10米/秒。这个速度快不过非洲猎豹,后者的速度为30米/秒。12级台风的速度是32米/秒,声音的传播速度是340米/秒,现代超音速飞机的速度为5倍音速;不久前刚刚坠毁的前苏联“和平号”空间站,接到地面指令后,是以7935米/秒的速度脱离卫星轨道的,所以其碎片到达地面时,可击穿2米厚的钢筋混凝土。除“和平号”空间站外,以上述速度运动的任何物体均不能穿越大气层,飞出地球,最终都将会被地球引力场拉回地面。因为要想挣脱地
To break free from the gravitational field of the earth, the key to flying out of the earth is to move objects faster. To give a clearer explanation of the problem, let’s look at what the top athletes in the world are doing in a dash - the answer is 10 meters per second. This is fast but African cheetah, the latter at a speed of 30 m / s. 12 typhoon speed is 32 m / s, the sound of the speed of 340 m / s, the speed of the modern supersonic aircraft 5 times the speed of sound; recently crashed the former Soviet Union, “Mir” space station, received the ground After the directive, it is off the satellite orbit at a rate of 7935 m / s, so its fragments can penetrate 2 meters of reinforced concrete when it reaches the ground. Except for the Mir space station, any object moving at the above speed can not cross the atmosphere and fly out of the earth, and will eventually be pulled back to earth by the Earth’s gravitational field. Because you want to break free