a M B P C X Problem 5: Two beams AB and BC are connected at point B via a hinge. Beam AB is fixed to a wall at point A. Beam BC is supported by a floor at point C. The coefficient of friction between the BC beam and the floor is . Beams AB and BC are loaded by a force P and a couple M as shown. Determine the reactions at points A, B and C. Solution: cos a Rox = Rox =-P 2(cos - sin ) 2 sin a cos a RAY=-Rby =-P Rcy = P MAZ = M-Pa 2(cos - sin ) COS a 2(cos usin) 2 sin - cos a 2(cos usin) -