3. A cantilever beam of length L = 2 m supports a load P = 10 kN. The beam is made of wood with cross sectional dimensions 150 mm 200 mm. Calculate the shear stresses due to the load P at points located 25 mm, 50 mm, 75 mm, and 100 mm from the top surface of the beam. Plot a graph showing the distribution of shear stresses from top to bottom of the beam. P 10 kN = 10 KN -L=2m 150 mm 200 mm