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Engineering and Tech / Engineering Mechanics: Statics 14 / Chapter 8 / Problem 8-20

Engineering Mechanics: Statics | 14th Edition | ISBN: 9780133918922 | Authors: Russell C. Hibbeler

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Solved: The ring has a mass of 0.5 kg and is resting on

Chapter 8, Problem 8-20

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QUESTION:

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 \(\mu_{\mathrm{A}}=0.2\) and at B, \(\mu_{\mathrm{B}}=0.3\).

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QUESTION:

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 \(\mu_{\mathrm{A}}=0.2\) and at B, \(\mu_{\mathrm{B}}=0.3\).

ANSWER:

Step 1 of 7

The free body diagram can be shown as,

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