net effort
... 活塞作用力 piston effort 交互作用力 interacting force; interaction force 净作用力 net effort ...
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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。
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.
youdao
If the two forces don't cancel, you have a net force.
如果这两个力没有抵消,便会有一个净作用力
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