# Stress in a beam

1. Feb 14, 2011

### thephysicsman

1. The problem statement, all variables and given/known data

[PLAIN]http://img17.imageshack.us/img17/5112/ph2b.jpg [Broken]

a) This steel beam has a quadratic cross-section (A=100mm2). The force F is 10 kN. Calculate the stress in the rod and show that this stress does not exceed the yield strength of the steel.

[PLAIN]http://img600.imageshack.us/img600/1163/phya.jpg [Broken]

2. The attempt at a solution

a)

$$\sigma = \frac{10000N}{0.0001m^2}=100 MPa$$

I guess this is right? I'm not sure what the yield strength is. Can I calculate it from the given formulas?

Last edited by a moderator: May 5, 2017
2. Feb 14, 2011