A beam of length 4.0 m and negligible weight rests on supports at each end and a concentrated load of 500 N is applied at its midpoint. Determine the shear force and bending moment at distances of (a)...

A beam of length 4.0 m and negligible weight rests on supports at each end and a concentrated load of 500 N is applied at its midpoint. Determine the shear force and bending moment at distances of (a) 1.0 m, (b) 2.5 m from the right-hand end of the beam.