Learn the connections
Topic guides
A formula gives you a relationship. A guide helps you decide when to use it, what to calculate first, and how to check the result.
Mechanical engineering
Shafts & torsion
Connect shaft geometry, shear stress, and angle of twist. Know which equation to use, what to calculate first, and how to check your answer.
8 min3 connected formulasWorked example
Mechanical engineering
Beams & bending
Follow a beam problem from its loading and bending moment to section properties and stress. Choose the right axis, keep the units straight, and distinguish strength from deflection.
9 min3 connected formulasWorked example
Mechanical engineering
Conduction & convection
Separate heat flow through a wall from heat transfer into a fluid. Choose the right temperature difference, compare steady heat rates, and distinguish rate from flux.
8 min3 connected formulasWorked example