What is the story of Newton's discovery of gravity?

During his stay in this country, Newton created the integral method, which was widely used in physics and geometry. One night, Newton sat under an apple tree in the country, thinking. Suddenly an apple fell to the ground. So he found that everything will inevitably fall down once it loses its support, and then he found that there is gravity between any two objects, and this gravity is inversely proportional to the square of the distance, and summed up the law of universal gravitation. But because of Newton's withdrawn and stubborn character, he published this theory twenty years later. In addition, Newton also conducted in-depth research and a large number of experiments on the basis of the work of Galileo and others, and finally summed up three servants? Sang? Yu? Private? Newton became the founder of classical physics.

Newton discovered gravity.

Bear published on March 23rd, 2006 18: 07: 00.

Newton discovered gravity.

Isaac newton, the greatest scientist in the 0/7th century, is one of the few scientific giants in human history. His contributions to physics, mathematics and astronomy are epoch-making.

1642 65438+On February 25th, Newton was born in Thorpe, urs, a small village in England. He was extremely weak at birth and almost died. Newton lost his father in his early years and lived with his mother. 166 1 year entered Trinity College of Cambridge University.

From 1665 to 1667, Newton was already thinking about gravity. One night, he was sitting under an apple tree to enjoy the cool, and an apple fell from the tree. It suddenly occurred to him: Why do apples only fall to the ground and not fly to the sky? He analyzed the three laws of Copernicus' Heliocentrism and Kepler, and then thought: Why do planets go around the sun without leaving? Why are planets fast when they are near the sun and slow when they are far away from the sun? The farther the planet is from the sun, why does it run longer? Newton believed that their fundamental reason was that the sun was very attractive.

After a series of experiments, observations and calculations, Newton found that the gravity of the sun is closely related to its huge mass. Newton further revealed the universal law of the universe: all objects are attractive; The greater the quality, the greater the attraction; The greater the spacing, the less attractive it is. This is the famous "law of gravity" in classical mechanics.

According to Newton's discovery, we can determine the mass of the sun and planets, determine the rules for calculating the orbit of comets, explain the ocean tides on the earth caused by the gravity of the moon and the sun, and deduce the minimum speeds needed to overcome the gravity of the earth, fly to the solar system and fly out of the solar system, which are 7.9 km/s, 1 1.2 km/s and 16.6 km/s respectively.

Newton wrote down his life's achievements in the book Natural Philosophy and Mathematical Principles. He discovered the three laws of motion of objects and founded calculus mathematics. Later, when talking about his achievements, he said, "If I see farther than others, it is because I stand on the shoulders of giants."

1727 In the early morning of March 20th, Newton died after a long illness. It is said that when life is about to stop, his mood is open and calm. The inscription written for him by the English poet Pope said: "Nature and its laws are hidden in the night; The emperor said,' Let Newton be born', which made everything bright.