Physics
Material Stress Analysis
Quick fact
The stress in a Boeing 747's wing during flight can exceed 200 MPa—nearly 30,000 pounds per square inch—yet the wing flexes without breaking because the material's yield strength is carefully designed to be higher than that maximum stress.
Why this is interesting
Have you ever wondered why a paperclip bends easily when you twist it, but a steel beam holds up a building? The answer lies in how stress distributes inside materials—a concept that decides whether something will snap or stay strong.