一、摩擦力产生的条件大家知道,两个互相接触的物体,当它们要发生或已经发生相对运动时,就会在接触面上产生一种阻碍相对运动的力,这种力就叫摩擦力.物体间产生摩擦力必须同时具备三个条件:物体间相互接触、挤压;物体间发生了相对运动或有相对运动的趋势;接触面欠光滑. First, the conditions of frictional conditions We all know that two objects in contact with each other, when they are to occur or have occurred relative movement, will produce a force on the contact surface to hinder the relative movement, this force is called friction Friction between objects must have three conditions at the same time: objects contact each other and squeeze; there is a relative movement or relative movement between objects; the contact surface is less smooth.