w(x) 5. (a) For solving friction problems, state why the number of unknowns is less than the number of available equatio

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W X 5 A For Solving Friction Problems State Why The Number Of Unknowns Is Less Than The Number Of Available Equatio 1 (52.27 KiB) Viewed 26 times

w(x) 5. (a) For solving friction problems, state why the number of unknowns is less than the number of available equations when impending motion occurs at some points of contact. (5 pts) (b) The beam shown is subjected to a distributed load and is supported at B by post BC with a mass of 20 kg. If the coefficients of static friction at B and C are μB = 0.4 and μc = 0.5, respectively, determine the force P needed to pull the post out from under the beam (either impending motion at B or C occurs). Neglect the weight of and thickness of the beam, and the materials of the beam and post are homogeneous. (15 pts) w(x) = 60x² N/m 2 m 240 N/m TB 0.75 m 0.25 m P