Problem 2.1 - Average Normal Stress

Problem Statement

A series of solid circular bars are loaded with three loads as shown, F₁ = 60 N, F₂ = 20 N, and F₃ = 40 N. What is the largest absolute normal stress in any bar?

Picture with a series of circular bars of three different diameters loaded with three loads attached to a wall. [Problem adapted from © Kurt Gramoll CC BY NC-SA 4.0]