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一、摩擦的种类摩擦可分为静摩擦:两个相互接触的物体,保持相对静止而存在相对运动趋势时产生的摩擦,滑动摩擦:一个物体在另一个物体表面滑动时产生的摩擦,滚动摩擦:滚动或有滚动趋势时产生的摩擦,共三类.例1:推桌子,桌子不动,为静摩擦;推着桌子在地面上滑动,为滑动摩擦;车轮在地面上滚动,为滚动摩擦;停在斜坡上的汽车车轮与地面间存在滚动趋势,也为滚动摩擦.二、摩擦力的种类摩擦力可分为静摩擦力:两个相互接触的
First, the type of friction Friction can be divided into static friction: two objects in contact with each other, to maintain relatively static and there is a relative movement trend of the friction, sliding friction: the friction of an object sliding on the surface of another object, rolling friction: There are three types of friction when rolling or rolling. Example 1: Push the table, the table does not move, for static friction; push the table to slide on the ground, for sliding friction; the wheel rolls on the ground, rolling friction; There is a rolling tendency between the wheel and the ground on the slope, which is also the rolling friction. Second, the type of friction can be divided into static friction: two mutual contact