Question

When shear force at a point is zero, then bending moment at that point is: (1) zero (2) minimum (3) maximum (4) infinity?

Answer 1

Shear force is equal to dM/dx where M is the bending moment caused due to load.

If Shear is zero, then M is maximum.

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Answer 2

Answer:

The Correct Answer would be (3) Maximum. Bending moment at a point where the shear force is acting is zero, would be maximum.

Explanation:

Internal Reactions which are developed upon  any cross-section area of a beam could result in a normal force, a shear force as well as resultant couple. For further proceedings with operations, we shall be putting constraints such that we'll be getting resultant normal as well as shear force zero. That means force would be zero, i.e, F = 0 and this will eventually lead to M or Bending Moment being constant i.e, M = constant. It achieves it's maximum value being a constant, hence, (3) maximum is correct.