Question

In a simply supported beam, where the shear force is zero, the bending moment will be

• A. Zero
• B. Maximum
• C. Minimum
• D. Zero or minimum

Answer 1

Answer:

B. Maximum

The bending moment in a simply supported beam will be maximum (positive or negative) where the shear force is zero. This is because the slope of the bending moment distribution is equal to the shear force, and the maximum and minimum values of bending moment occur where the slope is zero. Therefore, the correct answer is option 2. $\frac {dM}{dx}=F=0$