The force of friction slows the spacecraft down as it re-enters the earth's atmosphere.
航天飞机重返地球大气层时因有摩擦力而减慢速度。
The frictional force remains constant, dependent on the friction, the kinetic friction coefficient, is always the same...
摩擦力不守恒，它取决于摩擦力，动能摩擦系数，一直是相同的。
The more rough and jagged something is, the more easily more of its molecules will come into contact with molecules on the surface it touches, and thus the greater force of friction they will exert.
物体表面越粗糙不平，它的分子就越容易更多地与接触表面的分子相粘合，因此就会产生更大的摩擦力。
And so that means that the frictional force is a maximum value possible, N which is the static friction coefficient times N, and therefore that is mu of s mgcos And when will that happen?
这意味着,摩擦力在最大值，静摩擦力因数乘以,等于mus乘以,θ，times，mg，times，the，cosine，of，theta。,什么时候会发生？
For a ball rolling across the floor, that outside force could be the friction between the ball and the floor, or it could be the toddler that kicks the ball in another direction.
对于一个在地面上滚动的球而言，外力可能是球与地面之间的摩擦力或者幼童相反方向踢球产生的力。
Friction prevents it from doing so so there's going to be a frictional force in this direction.
摩擦力则阻碍下滑，因此存在，此方向的摩擦力。
Any hypothetic al force postulated to either push or pull oceanic plates would be quickly dissipated overcoming the friction of sliding over a static fluid mantle beneath.
任何假设的能推动或拉动大洋板块的力，会很快因克服在其下静态的热体地幔上滑动的摩擦力而被消散。
By friction is meant a force opposing motion.
摩擦力指的是阻碍运动的一种力。
This force, which we call friction, always opposes motion.
这种总是阻碍运动的力我们称之为摩擦力。
The illusion works with mechanical force, call it friction, wearing away at the sensibility.
感觉上，这幻象以机械的力量，所谓的摩擦力、磨损的物理力量运作著。
The force which must be overcome to keep one surface moving over another in known as sliding friction.
而保证一个平面沿着另一个平面相对移动的力称为滑动摩擦力。
The amount of force the clutch can hold depends on the friction between the clutch plate and they flywheel, and how much force the spring puts on the pressure plate.
离合器能传递的力的大小取决于离合器盘和飞轮之间的摩擦系数，以及弹簧对压盘的压紧力的大小。
The friction force in the clutch works just like the blocks in the frication section of brake, except that the spring presses on the clutch plate instead of weight pressing the block into the ground.
离合器的摩擦力和制动器的摩擦力起一样的作用，不同的是压在地面上的重压力变成了离合器中弹簧压在离合器盘上的压力。
Measured Q-S curve are back figured by nonlinear optimization approach and model parameters are found simultaneously, then distribution of axial force and skin friction along pile are calculated.
通过非线性优化算法，拟合实测的Q—S曲线，可得到桩土系统的工程力学参数，并由此计算得到桩身轴力及侧摩阻力分布曲线。
Scientists now believe that some of the force of friction is due to attraction between the molecules of one surface and those of the surface sliding over it.
现在科学家们认为有些摩擦力是由于物体表面的分子和另一物体表面游动的分子之间的吸引力所引起的。
Aiming at these problems, this paper studies how the original error affects the accuracy, works out its allowable values, and finds out the equation between friction of pins and clamping force.
针对这一问题，本文研究了零件加工误差对动模板合模位置的影响，得出了零件加工误差的许用值范围，并计算了由于销轴摩擦力对合模力放大比的影响关系式。
During normal construction process, the friction force between shield and soil exhibited greater influence on surface deformation compared with bulkhead additive thrust.
在正常施工时，盾壳与土体之间的摩擦力对地面变形的影响远大于正面附加推力。
This nonlinear change in friction force over a small change in velocity results in uncomfortable feeling when people hitchhike hydraulic lift.
该摩擦力的非线性改变使速度产生变化，导致人们在搭乘液压电梯时产生不舒适感。
Many random factors were taken into account when calculating the block reliability, such as angles of joint face, binding force, friction coefficient, the rock density, etc.
在分析块体的可靠度时考虑了结构面的产状、粘结系数、摩擦系数、岩体的容重等多个随机因素。
Finally, the total friction force of the PSS is measured.
最后，对系统的摩擦力进行了测试。
The friction force is each meshing point cut off resistance.
摩擦力就是各个啮合点被剪断时的阻力。
In order to investigate the origin of the oscillation of friction force on the atomic scale, Molecular dynamics simulation is employed to research it from the period of the oscillation.
为了研究原子尺度下摩擦力波动现象产生的本质，利用分子动力学模拟的方法从摩擦力波动周期的角度对其进行探讨。
In such a situation he would give anything for the sake of just a little friction force.
在这样的情况下，他会不惜任何代价来换取那怕只是一点儿摩擦力。
This paper mainly discusses the methods of judging the direction of friction force, and the effect and cause of friction force is studied systematically.
本文重点阐述了判定摩擦力方向的方法，对摩擦力的作用及摩擦力的成因进行了比较深入的探讨。
Statistic method is used to analyze the correlation between static contact area and dynamic friction force. The results clarify that there is a linear correlation with significant level.
应用统计学方法对静态接触面积与动态摩擦力进行了相关分析，结果表明二者具有显著水平的线性相关关系。
The mean unit force of friction to a great degree depends on shearing of pressure welding bridges and conquering of ploughing resistance.
平均单位摩擦力基本上取决于切断压力焊接桥和克服耕犁阻力。
The main causes of shaft wall fracture contain the reverse friction force and the temperature stress.
分析研究表明导致立井壁破坏的主要原因是井壁负摩擦力和温度应力。
Examined by practice, the method about the working condition parameter optimization for coal plough and the calculation about friction force on plow head are feasible.
经实践检验，本文的刨煤机工况参数优化方法和刨头摩擦力计算方法是切实可行的。
Examined by practice, the method about the working condition parameter optimization for coal plough and the calculation about friction force on plow head are feasible.
经实践检验，本文的刨煤机工况参数优化方法和刨头摩擦力计算方法是切实可行的。
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