Two equal and opposite point forces applied at mid- points of the ends of a rod of square cross shown. Consider the dotted section `ABCD`. If the rod is cut across this Gloss section, the force exerted by the right part of the rod on left part across this cross section is

Options

A. acting at point passing through cross section acting at point passing through cross section `ABCD`
B. acting at a point but not passing through the centre of cross section `ABCD`
C. uniformly distributed across the cross section `ABCD`
D. non-uniformly distributed across the cross section `ABCD`

Answer

C

Explanation

As already discussed in key concepts, if the cut is not very near to end of the bar, the internal developed force is distributed uniformly over the cross section.