关于摩擦力的一点讨论

A Discussion of Static Friction

讨论了各种情况下静摩擦力的方向和大小 ,着重讨论了水平转台上物体所受台面的静摩擦力 ,指出静摩擦力的大小和方向都应根据具体情况视之 .这些讨论可以帮助学生澄清一些错误概念 ,从而正确地认识静摩擦力这种力学中常见的作用力 。

The thesis discusses the magnitude and direction of static friction in defferent conditions,and mainly discusses the static friction of the object in rotation on the horizontal rotating table. The result is that the magnitude and direction of static friction are changed in different conditions. It is helpful knowledge to help the students to understand that the friction is a common force in mechanics.