(Solved): A propped cantilever beam has constant flexural rigidity \( E I=4.5 \mathrm{MN} \cdot \mathrm{m}^{ ...

A propped cantilever beam has constant flexural rigidity \( E I=4.5 \mathrm{MN} \cdot \mathrm{m}^{2} \). When the loads shown are applied Find the reaction (in kN) at joint B. (Solve by the method of superposition. Use the statics sign convention.) \( \mathrm{kN} \)