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在平面上运动的物体,通常受到平面对它的弹力和滑动摩擦力作用·在接触面的性质一定时,这两个力的合力与弹力夹角tanθ=Nf=μ是定值,与外界因素无关·θ角称之为摩擦角·一、用摩擦角的概念求解平衡类问题,不仅可以简化解题过程,又能避免繁杂的数学计算,使问题的解法简明扼要·
The object moving in the plane is usually affected by the plane’s elastic force and sliding friction. • When the nature of the contact surface is constant, the resultant force of the two forces and the elastic force angle tanθ=Nf=μ is a fixed value, and external factors The irrelevant θ angle is called the friction angle. One, using the concept of the friction angle to solve the equilibrium problem, not only simplifies the problem-solving process, but also avoids complicated mathematical calculations, making the solution of the problem concise and concise.