I'm going to rotate it in exactly the same direction, but now I'm not going to torque like this, in the Z direction, or like this, in the minus-Z direction.
将其以同样的方向转动，我不会这样使力，朝z的方向，或像这样，朝- Z的，方向。
And if there is a torque, there's going to be an angular acceleration.
如果存在一个力矩，就会产生一个，角加速度。
I'm going to torque by pushing my hand towards you, and the wheel does something completely unexpected.
我的手朝你们方向推，给它一个力，它就是做一些出乎，意料的事情。
And I'm going to put a torque on this bicycle wheel in this direction, so I'm going to put my right hand towards you and my left hand away from you.
我将把一个力矩放到上面，朝这个方向，我将把我的，右手朝向你们，左手远离你们。
But I don't care about that force because I'm going to take the torque about point p.
但是，我不在乎这些力，因为我要取的是，点p的力矩。
And so I'm going to take the torque relative to point q.
所以我要选择，相对于Q点的力矩。
The spin angular momentum is now in this direction, so I'm going to give it a torque like so.
旋转的角动量现在是这个,方向的，我给它一个这样的力。
And so the net, the sum of all forces on that object there is no net force on that wheel but there is a net torque, and that's why it's going to precess.
所以综合，物体受的所有力，车轮不会受到净力，但是有一个，净作用力，那就是我要推进的。
Now I'm going to torque it in this direction.
现在我将会朝这个方向使力。
Now I'm going to give it a spin in your direction and now again I'm going to torque like this.
我会让它朝你们方向旋转,同时我还会给它这样的力。
I hold it in my hand and I'm going to torque it like this so that the torque factor is in your direction.
我拿在手上，我将会像这样用力，力是朝你们方向的。
I'm going to put a torque on like this, put a little weight there.
我会这样加一个力，在那加一些重。
Now I'm going to take the torque about point q.
我将分析点q的力矩。
It's going to move in the direction of the torque.
朝着力的方向移动。
It's going to move in the direction of the torque.
朝着力的方向移动。
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