“What are you doing here?” Don snapped, shoving his hands in his pockets. Griffin stopped and did the same, like some kind of stand off between two rivals. Jane really looked at Griffin and thought there was something familiar about him.
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You can see that if a was equal to g, your downward acceleration is that of gravity, namely the cable has snapped in the elevator, Then you don't feel any weight.
你会发现如果 a 等于 g,你下降的加速度就是重力加速度,也就是电梯的绳索断了,那时你会完全失重
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