Isaac Newton(1642-1727)is a great British physicist, mathematician and astronomer He was born in a family of peasants in Lincoln on dec25 1624 and died of Kidney stone in London on Mar20 1727 Here are his contributions to mechanics: he made a further study on the basis of Galileo Galileiand other people and concluded the three principles of objects movement and made a firm foundation for mechanics. He is the discovererof the gravitation law and set up the theoretical system of the classical mechanics He also made profound contributions to the field of mathematics, optics and astronomy. <The math theory of natural philosophy>is his most important work. He concluded many important discoveries and study results in all his life in the book.9 Here are his contributions to mechanics : he made a further study on the basis of Galileo Galilei and other people and concluded the three principles of objects’movement and made a firm foundation for mechanics.He is the discoverer of the gravitation law and set up the theoretical system of the classical mechanics. He also made profound contributions to the field of mathematics , optics and astronomy.<The math theory of natural philosophy>is his most important work.He concluded many important discoveries and study results in all his life in the book. Isaac Newton (1642~1727) is a great British physicist ,mathematician and astronomer . He was born in a family of peasants in Lincoln on Dec25 1624 and died of Kidney stone in London on Mar20 1727