Forbo SIEGLING 西格林输送带摩擦系数Definition and peculiarities of friction定义和摩擦的特殊性
Definition of friction 摩擦的定义
Friction is a physical characteristic that exists between two distinct bodies in contact with each other that would resist a force with potential to produce movement of the bodies relative to the other. 摩擦是相互联系的两个不同的机构，会抗拒的力量与可能产生的机构相对于其他运动之间存在的物理特性。
m 米 = mass [kg] Weight of the body =质量[公斤]身体的重量
F N F ñ = normal force [N] Represents the force by which the weight of the body acts upon the supporting surface due to gr***ity =正常力[N]表示体重后，由于重力的支撑面行为的力量
F A F A = tractive force [N] Force to move the body against the supporting surface (active force) = [N]力移动对身体的支撑面的牵引力（主动力）
F F F F = frictional force [N] Force with the potential to resist the movement of the body against the supporting surface (reactive force) =摩擦力[N]***与潜在的抵抗运动对身体的支撑面反作用力
g = 9.81 m/s 2 (acceleration due to gr***ity; used for converting a mass in kilogram to a force in Newton) G = 9.81米/秒2（重力加速度;用于转换质量在牛顿的力量公斤）
Causes of friction 摩擦的原因
Friction is mainly caused by the surface roughness of the objects in contact to each other. 表面粗糙度的相互接触的对象主要是由于摩擦。 In general applies: The rougher the surface, the higher the friction.一般适用于：表面粗糙的，更高的摩擦。 However, if both surfaces become ultra-***ooth, friction from molecular attraction comes into play, often becoming greater than the mechanical friction.但是，如果两个表面成为超平滑，从分子吸引力的摩擦来发挥作用，往往成为大于机械摩擦。 This is especially the case with soft materials, like rubber and other soft synthetics.这是特别是与软质材料，如橡胶等软合成纤维。 Soft materials will deform when under pressure, material deformation is also increasing the friction.软质材料会变形，当压力下， 材料的变形也越来越多的摩擦。
Coefficient of friction m 的摩擦系数米
The coefficient of friction ( m ) is the ratio of the frictional force (F F ) divided by the normal force (F N ):摩擦系数（M）是摩擦力的比率（F F）除以正常的力（N） ：
This above ratio is called Coulomb's law of friction (Coulomb was a French physicist, 1726-1806).这以上的比例被称为库仑摩擦法（库仑是法国物理学家，1726年至1806年）。 The coefficient of friction has no units of measure (force divided by force).摩擦系数的测量单位（除以受力力）。
The friction law can easily be verified.摩擦法可以很容易地得到验证。 Pull an object (eg a book) by a spring scale over a clean surface and read off the tractive force (F A ).由一个干净的表面弹簧秤拉一个对象（例如书籍）和读出牵引力（ 一 ）。 Repeat the determination with the doubled mass (eg two books) and the tractive force will double.重复一倍的质量（如两本书）和牵引力将增加一倍的决心。
How to detect the coefficient of friction m 如何检测摩擦系数米
With the aid of a spring scale (see above) the approximative coefficient of friction between a belt and a specific surface can easy be detected.随着弹簧规模的援助（见上文）近似一条皮带和一个特定的表面之间的摩擦系数，可以很容易被发现。 There is a physically correct way (example a) and a physically not quite correct, but in the praxis applicable way (example b).有一个物理的正确方法（例如）和物理上不是很正确，但在实践适用的方式（例如B）。
a) Example of the physically correct way一个物理上正确的方法）的例子
Weight of the object m = 1 kg (unit of a mass is kg)对象的重量M = 1公斤（集体单位为kg）
Tractive force measured F A = 4.9 N (unit of a force is Newton)牵引力F A = 4.9 N（出一份力的单位是牛顿）
a) Example of the physically not quite correct, but in practice applicable way一）身体不太正确的例子，但在实践中的适用方式
Weight of the object m = 1 kg (unit of a mass is kg)对象的重量M = 1公斤（集体单位为kg）
Tractive "force" measured F A = 0.5 kg (unit of a force is actually Newton)牵引“力”测F A = 0.5公斤（单位的力量实际上是牛顿）
General rules 一般规则
Rule 1:第1条：
| ► ► The coefficient of friction always depends on both friction partners (material composition, surface roughness)摩擦系数总是取决于两个摩擦伙伴 （材料组成，表面粗糙度） |
Experiment: Rub various items with identical pressure, eg an eraser, a cigarette packet, a coin, belt sample on different surfaces, eg on a table, a glass pane, on coarse fabric - the resistance will feel quite different!实验：擦各种具有相同的压力项目，如橡皮擦，一个***盒，***，皮带样品在不同的表面，例如一个表上，玻璃，粗面料 - 电阻会感到很大的不同！
Rule 2:规则2：
| ► ► The coefficient of friction strongly depends on the surface conditi*** (cleanliness, humidity)摩擦系数在很大程度上取决于表面上的条件 （洁净度，湿度） |
Experiment: Rub two items with identical pressure, first with dry surfaces, afterwa*** with some drops of water between the contact surfaces - the resistance will feel different!实验：两个项目具有相同的压力擦，先用干燥的表面，随后与接触面之间的一些水珠 - 的电阻会觉得有所不同！