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。
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。
And if there is no net external force on the system as a whole during the collisions, then momentum is conserved.
若没有外力，作用于系统整体，在碰撞过程中，动量就是守恒的。
Kinetic energy can be destroyed, but momentum cannot be destroyed in the absence of a net external force on the system as a whole.
动能可以被毁，但是动量不能，在整个系统外力，不存在情况下。
The momentum of the cluster as a whole would not change if there are no external forces on the system, 0 if the net sum, the total external force, is zero.
星云的动量,作为整体是不变的,若无外力作用于系统，如果外力总和为。
This is afraid is not the problem of an enterprise, Chinese net swims need a resultant force.
这恐怕不是一个企业的问题，中国网游需要一个合力。
The Internet can be used for good or bad, but it is a net positive force in the world, because it connects us to each other.
因特网可用来行善或者作恶，但它终究是这个网络世界的一个积极的力量，因为它把我们联系在一起。
A high percentage of balls fail to fly over net or are without force.
不是球过不了网，就是软而无力。
So, when we get really close together, granted, there is a net positive negative charge with a Coulombic force of attraction.
当它们真正离得很近时，假设有一个带正负电的电荷，带有库仑引力。
Central server is deposited in computer room of class of AAA of net of domestic main force, provide a network redundant circuitry, its stability dependability is beyond question.
中心服务器存放于国内主干网AAA级机房中，并配备网络冗余线路，其稳定可靠性毋庸置疑。
The net stress is a driving force of misfit dislocation multiplication and is a very important factor for strained MQWs stability.
净应力是失配位错增殖的驱动力，是应变多量子阱稳定的重要判据。
A solid, however, no matter how plastic it is, dose not flow unless the net shear force on it exceeds a certain value.
但是，对于一种固体，无论其塑性如何，除非所受剪切力超过了某一限值，否则不会流动。
A solid, however, no matter how plastic it is, dose not flow unless the net shear force on it exceeds a certain value.
但是，对于一种固体，无论其塑性如何，除非所受剪切力超过了某一限值，否则不会流动。
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