It's related to the frequency with which you go around the circle Why is that?
它也跟圆周运动的频率有关,为什么呢
Well, right now, what we do out here is we do a little bit of stretch and handstands.
嗯,现在呢,我们在这儿做点儿伸展运动和倒立。
If you want to describe this particle, what's the kinematics?
如果你想描述这个质点,如何从运动学角度来描述呢
Do you like the playgrounds? And Golden Gate Park?
你喜欢去运动场吗?金门公园呢?
What is the fate of this particle?"
质点会怎样运动呢"
Now, what happens if the elevator is accelerating upwards with an acceleration a?
现在如果电梯向上以加速度 a 运动,会发生什么呢
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