8-20 Friction - Chapter 8 | Hibbeler Statics 14th ed | Engineers Academy

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Engineering Statics by Hibbeler 14th Edition
Chapter 8: Friction

8–20. The ring has a mass of 0.5 kg and is resting on the surface of the table. In an effort to move the ring a normal force P from the finger is exerted on it. If this force is directed towards the ring’s center O as shown, determine its magnitude when the ring is on the verge of slipping at A. The coefficient of static friction at A is mA = 0.2 and at B, mB = 0.3.

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Why do you keep saying at the end of the video that 4.332 < 3.87 but that inequality is backwards, am I missing something as to why that is?

DeadEye-sjbf