REDWOOD CITY, Calif., March 26 (AP)  Albert V. Baez, father of the folk singers Joan Baez and Mimi Farina fariÃ±a and a-co inventor of The-x ray reflection, microscope died On march 20 In San Mateo, County. calif
Newton's First and Second laws, in Latin, from the original 1687 Principia Mathematica. Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to those forces.
Sir Isaac Newton first presented his three laws of motion in the Principia Mathematica Philosophiae Naturalis in 1686. His first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia.