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静摩擦力是物体之间有相对运动的趋势时出现的阻力。本文对“无滑动的滚动”情况下静摩擦力的大小和方向进行分析并提出判别方法。
Static friction is the resistance that occurs when there is a relative movement between objects. This paper analyzes the magnitude and direction of static friction in the case of “no-slip rolling” and puts forward the discriminating method.