At last he seemed to have solved the main difficulties. But he did not publish his findings at once.
Only in 1687 did he at last publish his new theory.
Newton's great work, The Mathematical Principles of Natural Philosophy, marked the triumph of the Scientific
The very title is significant.
Newton had found the mathematical principles, the scientific laws which governed the movements of earth and heavens.
The book completed the working out of a new view of nature, a task begun by Copernicus.
The result was an exact mathematical world.
Newton put forward three laws of motion in the book.
The first law stated that bodies will tend to move in a straight line with uniform motion unless acted upon by a
Thus, a bullet shot from a gun moves straight ahead until it is stopped by a target or it slows and falls as a result
of the friction caused by moving through air.
The second law stated that the force applied to a body is in proportion to the acceleration of the body.
Thus, the harder you throw a ball the faster it will move.
The third law said that every action has an equal and opposite reaction.
Thus, when you hit a punching bag, it bounces right back at you.
Newton also worked out a mathematical expression for gravity.
It applied equally to the apple falling from the tree and the moon going around the earth.
Newton was soon recognized as the leader of English science.
上一页     下一页 【已有很多网友发表了看法，点击参与讨论】【对英语不懂，点击提问】【英语论坛】【返回首页】