经过一些时间的自由降落后，落体运动得很快，以至空气拽力(阻力)与落体的重量相等，于是就没有加速度了。
After some time of uninterrupted fall, the body is moving so rapidly that the drag of the air is as great as the weight of the body, so that there is no acceleration.
广工的两男生做了自由落体，河源的一个也同演一出戏，今天东莞的一女生也想不开来了个自由落体兼死亡加速度！
Canton workers two boys have done a free fall, Heyuan is also the same in a speech a drama, Dongguan, one of today's girls were also a spur to the acceleration of free fall and die!
(飞机)俯冲通常以远大于自由落体的加速度下滑。
To descend nose down at an acceleration usually exceeding that of free fall.
平均速度——时间图表可以给出这个自由落体的重力加速度。
A graph of average speeds versus time can give the acceleration due to gravity of the falling object.
平均速度——时间图表可以给出这个自由落体的重力加速度。
A graph of average speeds versus time can give the acceleration due to gravity of the falling object.
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