physics

(noun): A medicine or drug, especially a cathartic or purgative.
(noun): The art or profession of healing disease; medicine.
(noun): Natural philosophy; physics.
(noun): A physician.
(verb): To cure or heal.
(verb): To administer medicine to, especially a purgative.
(noun): The branch of science concerned with the study of the properties and interactions of space, time, matter and energy.
(noun): The physical aspects of a phenomenon or a system, especially those studied scientifically.

Newtonian physics was extended by Einstein to explain the effects of travelling near the speed of light; quantum physics extends it to account for the behaviour of atoms.
The physics of car crashes would not let Tom Cruise walk away like that.