[力] 摩擦力
而要取得更好(Better)的上前的摩擦力(Friction)即是借助脚步给大地一个向后的力,作用力与反作用力道理,自然大地会给脚面一个上前的摩擦力.
[力] 摩擦
蜗轮减速机一级传动减速比为9~87,双级传动减速比为 121~5133,多级组合可达数万,且针齿啮合系套式滚动摩擦(friction), 啮合表面无相对滑动,故一级减速效率达94%。
磨擦
橄榄油热敷秀发:在严寒的夏季,头发(Hair)很简单受到凉风的损伤和帽子磨擦(Friction)的毁伤,是以,按期用橄榄油对头发实行看护性的热敷在夏季对头皮和发梢是很是紧张的,它能够删除头发开叉情景,并良久坚持发根湿...
力 摩擦系数 ; 磨擦系数 ; 冲突系数 ; 波动系数
力 摩擦系数 ; 冲突系数 ; 材料摩擦系数
力 静摩擦 ; 静磨擦 ; 静摩擦力
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction:When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy. This property can have dramatic consequences, as illustrated by the use of friction created by rubbing pieces of wood together to start a fire. Kinetic energy is converted to thermal energy whenever motion with friction occurs, for example when a viscous fluid is stirred. Another important consequence of many types of friction can be wear, which may lead to performance degradation and/or damage to components. Friction is a component of the science of tribology.Friction is not itself a fundamental force but arises from interatomic and intermolecular forces between the two contacting surfaces. The complexity of these interactions makes the calculation of friction from first principles impractical and necessitates the use of empirical methods for analysis and the development of theory.