Articles
Detailed derivations and explanations behind the numbers the calculator produces.
What is the moment of inertia: definition, formulas and derivation
What the moment of inertia is, in plain words: the definition, the physical meaning, the point-mass sum and the integral form, with worked illustrations.
3 min read
Moment of inertia of a rectangle: deriving Ix = bh³/12
Step-by-step derivation of the rectangle section formulas Ix = bh³/12 and Iy = hb³/12 from the double integral, with the geometric meaning explained.
3 min read