# How to find moment?

1. Apr 12, 2010

### aifa89

how to find bending moment?
information given : distance= 0.9m
with SFD and BMD diagram...and the cross section
but the moment equation is not given...so how to find the bending moment at x= 0.9m?

2. Apr 12, 2010

### dfitz1000

If you're given the bending moment diagram, it's just a case of going to 0.9m on the x-axis and reading off the corresponding bending moment.

3. Apr 13, 2010

### aifa89

the problem is...the graph is not in scale...
it is just a sketch.

4. Apr 13, 2010

### dfitz1000

Hmmmmm, well, the bending moment is force x distance so you need to find the force at the point of interest.....can you post the full question?

5. Apr 13, 2010

### Studiot

Of course it is. It is probably to help or test your understanding of BM diagrams.

Don't forget that the 'sketch' will be a straight line or a parabola and that you can locate exactly the break and zero points. Once you have these you can calculate what happens at other points.