1. A beam of length L = 10 ft is supported by a fixed (cantilever) support at O. Determine the reactions at O when the beam supports these loads: A = 10 lb, B = 300 lb-ft and C = 10 lb, as shown. Determine the magnitude and direction of the moment at the fixed support at O. Determine the magnitude and direction of the reaction force at O. MA = 4 * 10 lb (CCW) MC = 10ft * 10 sin (45) (CCW) MB = 300 lb-ft (CW) Sum M) = 40 + 100(sin 45) - 300 Fy= 10 + 10 sin45 Fx = 10 sin 45 Ry = (-10-10sin45) Rx = -10 (sin 45) O A B 45.0⁰

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