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。
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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