# Sir Isaac Newton And Newton's First Law Of Gravity

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Gravitational theory is a theory that states any two particles attract each other with a force that is equal to the product of the two masses. Before Newton, the views on gravity and the motion of the planets, were quite different. Aristotle believed the universe never had a beginning and would never end; he believed it was eternal. Kepler’s view on gravity and motion was that the planets orbited around the sun and orbits faster the closer it becomes to the sun. Galileo believed if something started at the same speed, the speed will stay constant. As Galileo, Aristotle, and Kepler were all great scientist, there was another scientist who was known to be the greatest in the world, his name was Sir Isaac Newton. Newton was known as a physicist, …show more content…
Newton made many contributions to science. A couple of his major discoveries were the three laws of motion and the theory of gravity. Newton’s first law of motion is the law of inertia. The law of inertia states that an object at rest will remain at rest and an object in motion will remain in motion unless acted upon by a net force. Newton’s second law of motion states that force is proportional to mass and acceleration. Lastly, Newton’s third law of motion is for every action there is an equal and opposite reaction. Newton’s other major contribution to science was his theory of gravity; law of universal gravitation. Newton’s theory of gravity was that the forces between any objects is equal to their product of the masses, every object’s mass attracts to any other object’s mass in the universe, and is equal to the distance between them. This was also part of Henry Cavendish’s contribution to the Universal Law of Gravity. Cavendish's experiment that he tested to determine the gravitational force between masses involved a light, two spheres, and a rigid rod. Cavendish placed the two spheres on each end of the rod. He then twisted the rod and when the forces between the two spheres balanced, the spheres …show more content…
This was also known as the theory of gravity. Several scientist say that the theory of general relativity only makes sense if the object have the same mass. Some people may wonder what the importance of inertial and gravitational properties of mass play in the discovery of general relativity. Well, these are coordinating systems that accelerate to each other, so therefore you need the gravitational fields for the theory of general relativity. Albert discovered gravitational waves in 1916. Space time fabric is a way to visualize the existence of gravitational waves and see how they work. Gravity corresponds to the “bending” of the fabric because the twist of it is gravitomagnetism. Einstein claims that all gravitational forces corresponds to the bending of the fabric. Schwarzschild was a german physicist who was born in 1973. Schwarzschild radius is a radius that defines a certain body and its given mass and it is proportional to that mass. For example, if the body is smaller than the given radius, gravity is strong enough to keep matter and energy from leaving the radius. The Schwarzschild Radius was a way that they thought would be more helpful to be able to see massive stars and things such as black holes. Ever wondered if a black hole was real? When gravity pulls so much, that even light can’t escape, this is a space that is called a black hole. So, yes black holes are real. Putting it

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