Question

When the shear force at a section of a beam under bending is zero, the bending moment at that section is either a maximum or a minimum. This is because the shear force is a measure of the rate of change of the bending moment. When the shear force is zero, the bending moment is either at its peak or at its trough.

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

Answer 1

Answer:

D. Either maximum or minimum

The bending moment is maximum or minimum where shear force is zero.