8-31 Friction - Chapter 8 | Hibbeler Statics 14th ed | Engineers Academy

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Engineering Statics by Hibbeler 14th Edition
Chapter 8: Friction

8–31. Two blocks A and B have a weight of 10 lb and 6 lb, respectively. They are resting on the incline for which the coefficients of static friction are mA = 0.15 and mB = 0.25. Determine the angle u which will cause motion of one of
the blocks. What is the friction force under each of the blocks when this occurs? The spring has a stiffness of k = 2 lb/ft and is originally unstretched.

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[joivanjoel]

hello, i think the angle of point B will be different because they have different weight on horizontal and vertical components or do we use the same angle from Block A?