"自由下落"是个多义词,它可以指自由下落(单机游戏),自由落体(游戏宝可梦中的招式)。
用推力动作弹奏伸展的大和弦优于自由下落动作。
For large extended chords thrust is preferable to free fall.
原来,当你自由下落时,你并没有真正看到慢动作。
Turns out, when you’re falling you don’t actually see in slow motion.
改进了条形物体自由下落测量重力加速度的实验装置。
The experimental apparatus for measuring the acceleration of the freely falling bar object is improved in this thesis.
You don't feel any weight because your weight is the opposition you get to falling through the floor; but if the floor is giving way and you're just falling freely, you feel weightless.
你不会感到重力,是因为你的重力在阻碍你穿过地板,如果没有地板,你自由下落,也感觉不到重力
Conversely, if you get an answer and it doesn't seem to make sense, then you've got to go back and ask, am I violating some of the assumptions, and here you will find the assumption that the particle had that acceleration a is true as long it's freely falling under gravity but not when you hit the ground.
反过来说,如果你得到一个结果,发现似乎是错的,那么你就应该回过头来问问自己,我是不是违反某些前提了,这个模型中,你就发现,只要质点在重力作用下自由下落,质点具有加速度a的前提是正确的,但是落地后就不成立了
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