The coefficients of static and kinetic friction between the drum and brake bar are ? s? =
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The coefficients of static and kinetic friction between the drum and brake bar are ?s?= 0.4 and ?k?= 0.3, respectively. If M = 50N ? m and P = 85 N determine the horizontal and vertical components of reaction at the pin O. Neglect the weight and thickness of the brake. The drum has a mass of 25 kg.?
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