- #1

- 4

- 0

## Homework Statement

I'm looking at some problems and solutions to them, and when they calculate shear stress instead of having the area of the thing be pi*r^2, there is usually a (pi/4)*r^2.

## Homework Equations

Shear Stress = V/A

## The Attempt at a Solution

I don't understand where they get the 1/4 in the denominator.