The intensity of direct longitudinal stress in the cross-section at any point distant r from the neutral axis, is proportional to

If two tensile forces mutually perpendicular act on a rectangular parallelopiped bar are equal, the resulting elongation of the pipe, is

The moment diagram for a cantilever carrying linearly varying load from zero at its free end and to maximum at the fixed end will be a

For a beam, if fundamental equations of statics are not sufficient to determine all the reactive forces at the supports, the structure is said to be

For the same height, the bottom width for no tension,