We know in life that friction takes kinetic energy out.
我们知道在生活中，摩擦力抵消动能。
Friction can remove kinetic energy.
摩擦力可以转移动能。
Friction must take kinetic energy out.
摩擦力一定抵消动能。
I used first the conservation - of mechanical energy — there was no friction — and then I showed you that it's completely consistent with the work-energy theorem, so what would you do now?
首先，我用了机械能，守恒定律-，这里没有摩擦力-，我会向你们展示，这，和功能定理完全一致，现在你会怎么做呢？
I'm rotating it, and you see that friction is taking out kinetic energy and it's converting it to heat.
旋转它，然后看，摩擦力抵消动能，转化成热能。
The viscosity of the liquid medium reflects the ease of mobility, high viscosity, friction will increase, reducing output power, a waste of energy and have a high temperature.
液体的粘度反映了介质流动的难易程度，粘度过高会增加内摩擦阻力，降低输出功率，浪费能量，并产生过高的系统温度。
Can start the flow of contacts and dynamic friction resistance is to minimize the friction resistance, it can save energy, easy to get a higher velocity.
由于流动接触可使起动磨擦阻力及动磨擦阻力为极小，因此可以节省能源，容易得到较高运动速度。
No sliding, friction, rotating components, can reduce the energy loss.
无滑动、摩擦、转动部件，可降低能量损失。
When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.
当在边缘上的压力超过摩擦力时，能量通过地震以波的形式释放出来，穿过地壳造成我们所感觉到的震动。
Transport vehicles braking effect is generated by friction braking, the vehicle's kinetic energy into useless heat.
运输车辆刹车是通过磨擦作用产生制动力，将车辆的动能转化为无用的热能。
If grit is sharp anp irregular, the coefficient of friction, consumption of energy and wear speed will be greater.
尖锐的、不规则形状的磨粒，摩擦系数、能量消耗、磨损速度都较大。
However, until now the internal friction is only considered in limit analysis and plastic mechanics, but not included in elastic mechanics and energy theory.
然而，至今只有岩土极限分析与塑性力学中考虑岩土体的内摩擦力，而在弹性理论与能量理论等诸方面均未体现。
It is the high surface energy that contributed to larger friction coefficient of polyurethane threads.
高表面能引起的粘着为聚氨酯摩擦系数较高的主要原因。
Above behaviors of friction noise were explained with the energy dissipation principle.
提出了用能量耗散原理来解释上述现象。
It may be shown that the optimum distribution of the friction coefficient of points on the absorber is a gradually increasing series when the total reflection energy coefficient is at minimum.
证明了在总反射能量系数为最小时，其各点摩擦系数的最佳分布为一确定的渐增序列。
The stem seal of a feed water control valve uses expanded graphite packing in order to produce friction and to economize on energy for the control valve working.
电站锅炉给水调节阀的阀杆密封采用柔性石墨填料，既降低了摩擦力，又为调节阀的运行节约了能源。
The lower interphase energy in the martensitic transformation results in a lower value of internal friction peak as compared with that in diffusional transformation.
马氏体相变中相界面能量较低，导致其内耗峰值低于扩散型相变的峰值。
Fatigue of metals is an energy dissipation process. The main energy dissipation includes the internal friction and the stored energy.
金属疲劳是一个能量耗散过程，其中主要的能量耗散形式包括内耗热和储能。
It is pointed out that translational kinetic energy and rotational kinetic energy mutually transferred by sliding friction force, but it only has positive acting.
讨论滑动摩擦力作功，说明了滑动摩擦力可以使刚体的平动动能和转动动能之间相互转换，但总是作负功。
No movement mechanism friction wear, the mechanical efficiency high, this is type compressor vortex than other air compressor greatly energy saving main reason.
无运动机构的磨擦磨损，机械效率高，这是涡旋式压缩机比其它空气压缩机大大节能的主要原因。
A paradox of work done by friction is clarified, and the general format of principle of energy-work and the first law of thermodynamics are presented.
本文澄清了一个关于摩擦力做功的佯谬，并提出了功能原理与热力学第一定律的一般形式。
This paper gives, from the energy equation for rapidly varied flow, the equations for the calculation of the curve of equal cavitation number in consideration of friction losses.
本文在考虑水流阻力的情况下，提出计算等空化数曲线的方程组，并给出电算程序。
How maximum limit reduces the friction coefficient with to enhance the energy efficiency?
如何最大限度地减少摩擦系数与提高能量效率？
The ceramic pushing plate has high reliability, long service life, and energy-saving effect because of the low surface friction coefficient and small rotational resistance.
陶瓷推力盘具有可靠性高使用寿命命长的特点，由于其表面摩擦系数低，转动阻力小，因而还具有节能效果。
The low coefficient of friction of the SBC linear guide allows smaller drives to be used and contributes to energy savings.
由于SBC导轨摩擦系数小，可使驱动装置小型化，并同时减小电力损耗。
This work combined the heat transfer with flow friction to analyse the comprehensive utilization of energy and established the dimensionless equation, which can analyse the influence of structure par…
依此探讨管束换热过程特征参数对综合能量利用性能的影响，指导翅片管加热器能量的高效利用，并与光管加热器进行了比较分析。
It features in following four aspects: (1)Bush bearing is replaced by rolling bearing , friction resistance being greatly lowered down , easy to be started and energy saving ;
圆锥球磨机主要有四个特点：（1）传动采用滚动轴承替代滑动轴承，摩擦力大大降低，启动容易，节能显著。
The Numerical Analysis of Energy Density during Inertia Friction Welding Process;
可以用类似的方法定义动量密度，能量密度等等。
The Numerical Analysis of Energy Density during Inertia Friction Welding Process;
可以用类似的方法定义动量密度，能量密度等等。
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