Beams of uniform strength are preferred to those of uniform section because these are economical for

The width of a beam of uniform strength having a constant depth d length L, simply supported at the ends with a central load W is

A closely coiled helical spring of radius R, contains n turns and is subjected to an axial load W. If the radius of the coil wire is r and modulus of rigidity of the coil material is C, the deflection of the coil is

If Z and I are the section modulus and moment of inertia of the section, the shear force F and bending moment M at a section are related by

To ascertain the maximum permissible eccentricity of loads on circular columns, the rule generally followed, is