在碰撞动能转变的热能作用下，造成了早期地球的表面熔融。
With the effect of that collision kinetic energy converted into heat energy, the surface of the early earth melted.
有这样一个例子，这种情况，我们上节课就见过几个，它们是非弹性碰撞，当失去动能时，它是非弹性碰撞。
And then there is a case of which we have seen several examples last time of inelastic collisions, when you lose kinetic energy, so this is an inelastic collision.
在这个例子中，它是完全非弹性碰撞，我们上节课也看到了，我们失去了动能，它可能转化为热量。
And in the case of the completely inelastic collisions that we have seen last time, we lost kinetic energy, which was converted to heat.
我们失去了动能，这是完全非弹性碰撞。
We lose kinetic energy when there is a completely inelastic collision.
你认为是什么情况，碰撞后的动能怎样？
What do you think the situation is with the kinetic energy after the collision?
碰撞后的动能。
我们可以计算出差别，在储存能量。，与碰撞后动能的差别，还有碰撞前动能。
Now we can calculate what the difference is between the potential energy... the kinetic energy after the collision and the kinetic energy before the collision.
原来有一定量的，碰撞前的动能，当然，我们可以计算出来，碰撞前的动能。
Now, there was a certain amount of kinetic energy before the collision, and of course, we can all calculate that kinetic energy before the collision.
碰撞前没有动能。
碰撞后动能是多少？
我说我选择这个例子，它是完全弹性碰撞-，为0,Q, is, zero——，那么动能必然守恒。
I told you I chose the case of - a completely elastic collision — Q and so kinetic energy must be conserved.
你若称之为碰撞，但之后又有了动能。
If you want to call it the collision, but there was kinetic energy afterwards.
在这次碰撞中，我希望你们告诉我，你是否这样认为，动能也许增加，也许减小，也许保持不变。
We had this collision, and I want you to tell me whether you think that the kinetic energy has perhaps increased or decreased or maybe the kinetic energy hasn't changed.
我能设计一次碰撞，使动能完全转化。
I can arrange a collision so that all kinetic energy has been removed.
在非弹性碰撞中，总是失去动能，能否在一次碰撞中，动能增加？
必须记住，动量守恒甚至对于非弹性碰撞也是成立的，尽管这时动能已不守恒。
It is important to realize that momentum conservation applies even to inelastic collisions, in which the kinetic energy is not conserved.
推导了相关文献中定义的碰撞恢复因数与动能损耗系数间的对应关系。
The correlation between the factor of restitution in impact and the factor of kinetic energy loss defined in corresponding references is deduced.
在能量转换和吸收方面，汽车与缆索护栏系统的碰撞过程中，汽车动能的减少大部分被护栏吸收，其他形式能量转化很少。
During the impact process, most of the car's kinetic energy convert into the guardrail's internal energy and seldom other energy forms were converted.
这些能量表现为碎片的动能，当碎片与物质碰撞时，碎片的动能转化为热能，碎片的运动就慢了下来。
The energy appears as kinetic energy of the fragments, which converts to thermal energy as the fragments collide in matter and slow down.
两个物体间的互相碰撞，在这个碰撞过程中，它们的一部分动能转化为其它能量形式。能量的总和不变。
A collision between two particles in which part of their kinetic energy is transformed to another form of energy. The total amount of energy remains the same.
常见的事故类型通常都伴随着车辆的碰撞变形，事故车辆动能的一部分在碰撞中转化为变形能。
Traffic accident will generally lead to vehicle's impact crash, and part of kinetic energy of the damaged vehicles is transferred to deformation energy.
美国战区高空区域防御（THAAD）系统拦截导弹，选用动能杀伤器与来袭目标直接碰撞摧毁目标。 动能杀伤器采用红外成像寻的器。
THAAD system intercept missiles use kinetic energy antipersonnel weapon to impact target and destroy it, the kinetic energy antipersonnel weapons use imaging IR seeker.
第四级是20磅“动能拦截弹头”(LEAP)杀伤运载具，采用红外传感器逐渐接近和碰撞目标。
The fourth stage is the 20 pound LEAP kill vehicle, which USES infrared sensors to close on the target and ram it.
一开始你最好排空碰撞着铅笔各面的空气。因为单是氧原子的动能就足以让铅笔失衡。
Well to start, you'd better get rid of all the air bumping on the sides of the pencil, since the kinetic energy of a typical oxygen molecule is enough to destabilize the pencil.
弹团簇的碰撞平动能在到之间。
The collision energy per atom of projectile cluster is varied from to .
穿甲动能毁伤是利用带有动能侵彻体的高速动能武器，以很高的飞行速度碰撞到目标后产生的毁伤效果。
It has known well armour-piercing damage by armour-piercing warhead, yet it has discussing kinetic energy damage to hit.
两碰撞核内部激发能由相对运动能损提供，因此能够将核子转移过程与相对运动耦合起来。
The excitation energy of two colliding nuclei is supplied by the energy dissipation of their relative motion, thus the nucleon transfer process and the relative motion are coupled.
两碰撞核内部激发能由相对运动能损提供，因此能够将核子转移过程与相对运动耦合起来。
The excitation energy of two colliding nuclei is supplied by the energy dissipation of their relative motion, thus the nucleon transfer process and the relative motion are coupled.
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