To begin with, what we should take note of is that an important tool in this science is calculus. It is believed that he invented calculus, but it is also believed that it was invented by Gottfried because they both discovered at the same time. Newton’s belief is based on gravity and the three laws of motion. They consist of the principle of inertia, F = ma (force equals mass times acceleration), and for any action, there is always an opposite and equal reaction. To jump into detail for the principle of inertia, it explains that an object in motion remains in motion in a straight line, and an object at rest remains at rest, unless acted upon by an outside force. As for F = ma, we can take the example of a moving baseball. The harder you hit it, the faster and the further it goes. The three laws of motion are the focal points of his science.
In notion of universal gravity, it is defined as a mutually attractive force between any two objects. For an illustration, when dropping a book, the Earth’s gravity attracts the Earth to the book, but simultaneously, the gravitational attraction of the book attracts the Earth to the book. Although the book initializes the force, it does not have any effect to the Earth because the Earth has much a bigger mass than the book. In addition, the more massive the objects are, the greater the gravitational attraction is.
On another note, before Newton, it was believed that white light was colorless. After his various experiments, they revealed that it was composed with the colors of the rainbow.
In 1905 came along Albert Einstein with his