2.2. Moment Diagram
Establish the M and x axes and plot the values of the moment at the ends of the beam.
• Since the slope of the moment diagram at any point is equal to the intensity of the shear at the point.
• At the point where the shear is zero, and therefore this may be a point of maximum or minimum moment.
• If the numerical value of the moment is to be determined at a point, one can find this value either by using the method of
sections as discussed befor or by using Eq:

which states that the change in the moment is equal to the area under the shear diagram.
• Since V(x) is integrated to obtain M, if V(x) is a curve of degree n, then M(x) will be a curve of degree For example, if V(x) is linear, M(x) will be parabolic.
