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task 2: Castilian Brückeninspektion [12 P] truck Bridge. За -Boom 4a Given is a truck with a boom for examining bridges. This is firmly clamped to the truck and can be rotated in the lower area to get under the bridge. The structure is illustrated in a simplified manner by the substitute system shown (boom rotated 90° to the z-axis). Only the cantilever is to be considered for the calculation. Assume the cross-sectional area A, area moment of inertial and IT for torsion in all sections of the cantilever. The shear components can be neglected. a) Cut out the system and draw the free body diagram. b) Calculate the strain energy of the system. c) Then calculate the lowering u, in the direction of the crane application point from F using Castigliano's theorem. Gegeben: E, I, IT, A, a