Introduction to Classical Mechanics · Problem 2.29
Statics — Morin
Physics — Mechanics · hinge_force_direction
Problem
Direction of the force *
A stick is connected to other parts of a static system by hinges at its ends. Show that (1) if the stick is massless, then the forces it feels at the hinges are directed along the stick, but (2) if the stick is massive, then the forces need not point along the stick.