Question 1
What is the main reason an engineer checks whether a calculated answer has the right units?
Question 2
If a force component is reported as $-5~\mathrm{kN}$ when the positive direction was chosen to the right, what does the negative sign mean?
Question 3
Why is a free-body diagram important before writing equilibrium equations?
Question 4
A computed displacement is several times larger than the member length. What is the best engineering interpretation?
Question 5
If the calculated normal stress exceeds the material's yield strength, what is the correct interpretation?
