除了上文中提及的动摩擦外,也有非运动物体的静摩擦力,如触摸金属表面和撞击。当摩擦涉及流体或空气,被称为流体摩擦。飞机的空气阻力,船的水的阻力,包括水上公园的滑梯都是流体摩擦的例子。
Finally, the two main factors that influence the total amount of friction include the roughness of the objects' surfaces and the force applied between the two objects. The measure of friction, its coefficient, is based on the roughness of the materials that come in contact with each other. For example, concrete on concrete has a very high coefficient of friction, and the Teflon surfaces of pots and pans have a low coefficient because it is a surface where most things do not stick.
最后,影响摩擦大小的两个主要因素是接触表面的粗糙度和作用在两个对象之间的力。摩擦力,其系数是基于相护接触的材料的粗糙度。例如,混凝土之间的摩擦系数非常高的系数,而锅具的特氟隆表面的摩擦系数很低,因为大部分东西都不沾附其表面。
In summary, friction is the resistance of motion when an object rubs against and acts in the opposite direction of another object. There are four types of friction which includes kinetic friction, dry friction, rolling friction, static friction, and fluid friction. Common examples of friction are brakes on a car, ice skates, and wearing rubber shoes on a wet surface. Roughness and force of objects are factors of friction, and the coefficient of friction is a measure of how easily one object moves in relationship to another.
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2020-09-15
2020-09-15
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