1. The problem statement, all variables and given/known data Calculate the maximum bending moment on the bridge section using the values given. (REFER TO DIAGRAM ATTACHED) mass of bridge = 9250 kg mass of car = 2250 kg length of bridge section = 26 m 2. Relevant equations I worked out previously that: Reaction at A = reaction at B = 56407.5 N , which I got right ƩFx = 0; ƩFy = 0; ƩM = 0; 3. The attempt at a solution I know the maximum Bending Moment is at x = 13m (because shear force = 0 ant x = 13m) weight of bridge = 6250 x 9.81 = 90742.5 N weight of car = 22072.5 N I tried three ways, I know the 1st is wrong. 1st method: Bending Moment max: = 90742.5N x 13m + 22072.5N x 13m = 1466595 N.m 2nd method: Bending Moment max: make a cut at 0≤x<13m , (shear force) v = 56407.5 N so integrate this to get BM at x = 13m: BM = 56407.5x so at x = 13m: Bending Moment max = 56407.5 x 13 = 733297.5 N.m 3rd method: Bending Moment max = wL/4 (for point load car) + wL^2/8 (uniformly distributed load of bridge) = 22072.5 x 26/4 + 90742.5 x (26 x 26)/8 = 7811212.5 N.m So, I'm quite stuck on the method. Thank you so much for any help!!