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一、摩擦力的类型判断例1(2012年广州市)下列摩擦属于滚动摩擦的是()。A.铅笔与卷笔刀间的摩擦B.旱冰鞋与地面间的摩擦C.花样滑冰鞋的冰刀与冰面间的摩擦D.自行车刹车时闸皮与钢圈间的摩擦典型错解:选A或D,理由:两者有滚轮;选C,理由:滑冰鞋都带有滚轮。错误纠正:A、D中铅笔与卷笔刀间、闸皮与钢圈间的接触面并没有发生变化,故属于滑动摩擦。C中花样滑冰鞋是
First, determine the type of friction Example 1 (Guangzhou City in 2012) The following friction belongs to the rolling friction is (). A. The friction between the pencil and the pencil sharpener B. The friction between the roller skates and the ground C. The friction between the ice skates and the ice skates of the figure skating D. The friction between the brake shoe and the steel ring when the bicycle is braked Typical misunderstanding: A or D, reason: both have wheel; choose C, reason: skates with a wheel. Error correction: A, D pencil and pencil sharpener, the contact surface between the brake shoe and the steel did not change, it is a sliding friction. C in figure skates is