friction 显示所有例句 n. 1. [u] 摩擦the action of one object or surface moving against another 2. [u] 摩擦力the resistance (= the force that stops sth moving) of one surface to another surface or substance moving over or through it ...
(such aspoundsornewtons), the coefficient of friction is dimensionless. Thevalueof the coefficient of friction for a case of one or more bricks sliding on a clean wooden table is about 0.5, which implies that a force equal to half the weight of the bricks is required just to overcome ...
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The simple fact shows that the more of the force of friction is got rid of,the farther will the ball travel,and we are led to infer that,if all the impeding forces of gravitation and resistance could be removed,there is no reason why the ball,once in motion,should ever stop. 相关知识...
Two factors are important in determining which type of force law is observed. One factor is the ratio of the interfacial energy between the contacting materials to the interatomic potential energy within the materials. Viscous friction is associated with weak interfacial energy, and static friction ...
Usually,yes.Frictionalforceistheproductofnormalforce(whichisusuallyrelatedtoweight)andthecoefficientoffriction.产生条件:接触面粗糙,物体间有相互挤压的弹力,有相对运动或相对运动的趋势.作用效果:阻碍物体的相对运动或相对运动趋势.方向:与接触面相切,与物体自身的相对运动或相对运动趋势的方向相反.大小:(1)滑动摩擦力...
A housing arrangement for a friction clutch including a ring-like housing wall region which has on its radially inward-facing inside a toothing formation for the rotary coupling of at least one friction member, the housing arrangement fu... ...
a山东省临沂市人民医院 Shandong Province Linyi people hospital[translate] a挂盐水 Hangs the salt water[translate] aof the friction force is computed which acts in the tangential 摩擦力被计算在正切行动[translate]
Recent developments, however, have seen the introduction of solid (and liquid)22,23 products which can be applied from the vehicle; a move prompted by the network operators to shift costs to the passenger and freight companies. A key objective of a friction modifier is to provide a positive ...
An exercise device which can be fixed to a support and through which a rope is pulled against the force of frictional engagement within the exercise device. The resistive force against the pull is determined by the number of turns of the rope about a center shaft in the exercise device. The...