Problem 2 [25 points] An aircraft wing spar has the I-shaped cross-section shown in the figure below. The lift distribution over the wing produces a shear force of L = 1 kN at a certain point along the wing span. 100 mm - | | l 3 mm ~ L 1 L=1KkN A 2 T y | |=3mm l 3 mm - 1 a) Calculate the moment of inertia I, of the spar. [5 points] b) Calculate and sketch the shear flow distribution in the spar due to the lift. [20 points]