"A top, whose parts by their cohesion are continually drawn aside from rectilinear motions, does not cease its rotation, otherwise than as it retarded by the air."
- Sir Isaac Newton: "Mathematical Principles of Natural Philosophy"
Center of mass and center of gravity.
Torque and angular acceleration. Rotational inertia. Moment of inertia and its calculation.
Angular momentum and its conservation. Gyroscopes.