SFD & BMD for a cantilever with a point Load at it's free end: Consider a cantilever beam of span "L" fixed at end A and free at end B carrying a point load at end B. Consider a section X-X at a distance x from free end B & consider the right portion of the section. The shear force at this section will be equal to the resultant of forces acting on right/left portion of the assumed section as per the definition of shear force. But the resultant force acting on right portion of X-X is "W" acting in downward direction. Since W lies in right portion of X-X, it will be considered positive as per sign conventions of SFD. Hence shear force at X-X is positive. Let F x = shear force at X-X. F x = +W _______________ (1) The shear force will be constant at all the sections between A and B since there is no other load present between A and B...
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