1.Rate of change of bending moment is equal to

2.A flitched beam consists of a wooden joist 150 mm wide and 300 mm deep strengthened by steel plates 10 mm thick and 300 mm deep one on either side of the joist. If modulus of elasticity of steel is 20 times that of wood, then the width of equivalent wooden section will be

3.The maximum bending moment due to a moving load on a fixed ended beam occurs

4.Maximum bending moment in a beam occurs where

5.A beam of square cross-section with side 100 mm is placed with one diagonal vertical. If the shear force acting on the section is 10 kN, the maximum shear stress is