9.4-2 A simple beam AB is subjected to a distrib- uted load of intensity q(x) = 40 sin πx/L, where qo is the maximum intensity of the load (see figure). Derive the equation of the deflection curve, and then determine the deflection 8 max at the midpoint of the beam. Use the fourth-order differential equation of the deflection curve (the load equation). A Π.Χ q(x) = 90 sin L PROBLEM 9.4-2 L- B x