net force 净力 ; 合力
net impelling force 纯推动力
net t force 净力
net drag force 净牵引力
net for force 净举力
China Net Air Force 中国网络空军
net in-plane force 净面内力
net tractive force of wheel [车辆] 车轮牵引力
net addition to labor force 劳动力的净增
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。
If these were the only two forces, then the net force on this object, on this particle I, would be...
如果这是唯一两个力，那么物体所受的合力，粒子i的合力。
If there had been a net force, then indeed it would also go down, if this force were larger than this.
如果没有净力，那就不会下降了，如果那个力大于这个。
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