The bending moment in the center of a simply supported beam carrying a uniformly distributed load of w per unit length is
A
Zero
B
$$\frac{{{\text{w}}{l^2}}}{2}$$
C
$$\frac{{{\text{w}}{l^2}}}{4}$$
D
$$\frac{{{\text{w}}{l^2}}}{8}$$
Correct Answer: $$\frac{{{\text{w}}{l^2}}}{8}$$