The Douglas Fir beam is reinforced with A-992 steel straps at its sides. Determine the maximum stress in the wood and steel if the beam is subjected to a moment of Mz = 80 kN # m. Sketch the stress distribution acting over the cross section.

13.155 InExample 13.15(no added infois requirefrom example 13.15 other thanthecam shape and the angular velocity (a)in termsof polar listebelow), determinethevelocityof the camfollowerwhen 0 = 1350 and eqns coordinatesand (b)interms of Cartesiancoordinates(justonvertyour answers to(a)using Fig3.8 aboveit in yourbook). The shape of the camis givenby r =0.15/(1+ 0.5cos0)where r isinmeters. The angular velocityof the arm iconstantand= 4 rad/seccounter-clockwise. 13.156 InExample 13.15,determine the acceleratiof thecam followerwhen 0 =1350 (a)interms ofpolar coordinatesand (b) in terms Cartesiancoordinates(justonvertyour answers to (a)using Fig3.8 and eqns above it inyo