# Civil Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 4 (Q.No. 1)
1.
The bending moment is maximum on a section where shearing force
is maximum
is minimum
is equal
changes sign.
Explanation:
No answer description is available. Let's discuss.
Discussion:
15 comments Page 1 of 2.

JOYId said:   4 years ago
At SSB the fixed end has Max BM & SF both.

So, it's better to generalize that SF sign change= Max BM.

Mechanical aspirant said:   5 years ago
Both zero and changes sign is the correct answer. Because when sf changes sign from max to min or vice versa, it will come to a point when sf will be zero.

So according to the given options "changes sign" is the correct answer.

Jishnups said:   5 years ago
In a section, if there is no point like sf 0. There must be a point of max bm so, Answer is minimum.

Kundan said:   5 years ago
@All.

The options should either have 'minimum' or 'changes sign' because where sfd change its sign that point is where SF is zero.

Anand said:   5 years ago
If shear force is zero at that poin BM is may maximum or minimum.

When shear force changes it sign at that point of zero SF, maximum BM occurs.

Mohd Salman Qassar said:   6 years ago
Option D (zero) is correct.

Where shear force zero there bending moment maximum.

Vijay said:   7 years ago
Yes, you are correct @Usman.

Usman Khatri said:   7 years ago
D is correct, since changes sign means the point zero. For e.g consider a positive shear force +2 declining to negative-2 i.e. +2, +1, 0, -1, -2 ,so that point zero is where the bending will be maximum or in other words, it is the point where sign changes.

PRIYA said:   7 years ago
I think B will be the correct one.

Rajesh said:   7 years ago
When there is zero in the given option then what will be the correct answer?