Mechanics: What area to use?

1. Apr 2, 2015

1question

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

In a simple mechanics question, which area should be used for a stress calculation? ex. A brick is compressed on 2 sides (opposite to each other) by a given compressive force F. The area of each of the sides being compressed is A.

2. Relevant equations

σ = F/A

3. The attempt at a solution

I'm just confused if it should be σ = F/A OR σ = F/(2A) and why.

2. Apr 2, 2015

1question

It's just σ = F/A. I forgot that A is cross-sectional area.