Question

At a point on the beam where shear force changes signs, the bending moment at that point is

• A. zero
• B. decreasing
• C. maximum
• D. increasing

Hint:

When the shear force changes sign, the bending moment is zero because the slope of the bending moment curve becomes zero.

Answer 1

The Correct Option is A

Step 1: Shear Force and Bending Moment Relationship.
The shear force at any location on a beam is the derivative of the bending moment at that location. A change in the shear force's sign indicates a zero slope on the bending moment curve, meaning the bending moment is zero at that specific point.Step 2: Conclusion.
The bending moment is zero where the shear force changes signs. Final Answer: \[ \boxed{0} \]