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摩擦在生活和生产中有重要作用,人们利用有益摩擦和防止有害摩擦的例子比比皆是.对于摩擦现象,同学们已有较丰富的感性认识,但却往往不能与理性认识统一起来,这是因为对基础知识理解得不全面,因此,学习摩擦力,一定要夯实基础.摩擦力的概念与分类两个相互接触的物体,当它们发生相对运动或有相对运动的趋势时,在接触面上产生的阻碍相对运动或相对运动趋势的力,叫作摩擦力.摩擦力分为滑动摩擦力、滚动摩擦力和静摩擦力.我们通常所说的摩擦力一般指滑动摩擦力.
Friction plays an important role in life and production, and people use examples of beneficial friction and prevention of harmful friction.For the phenomenon of friction, students have a wealth of perceptual knowledge, but often can not be unified with rational knowledge, which is Because the understanding of basic knowledge is not comprehensive, therefore, learn friction, we must lay a solid foundation.Friction concept and classification of two objects in contact with each other, when they occur relative movement or relative movement trend, the contact surface Produced to impede the relative movement or relative movement trend of the force, called friction.Friction is divided into sliding friction, rolling friction and static friction.We usually refer to the friction generally refers to the sliding friction.