What were Isaac newton's discoveries in gravity?

Answer 1

Even before Sir Isaac newton was born, roughly 16 out of every 19 people had already noticed that when they jumped out of bed, their feet went to the floor, and that when they dropped something, it fell to the ground. Gravity was already quite universally known, whether or not that's what anybody called it, and it didn't need to be discovered.

All Newton did was to accurately describe how it works.

Furthermore, he took the INCREDIBLE leap of stating that the gravity we experience on our Earth also influenced the motions of planets around our Sun.

Answer 2

Isaac Newton discovered that gravity is a universal force and that the size of the force can be predicted.

Translated from his Latin to modern English (and slightly simplified) Newton's Universal Law of Gravitation is: "Every mass attracts every other mass by a force pointing along the line intersecting both masses. The force is proportional to the product of the two masses and inversely proportional to the square of the distance between the masses."

People have always known that things fall when you drop them. Galileo Galilei had already extended this to show that gravity accelerates all objects at the same rate on Earth and suggested that it was the force that caused the planets to orbit the sun however there were some fundamental flaws in Galileo's hypothesis which Newton corrected.

Newton's theory of gravity remained the best explanation of gravity until the 20th Century when Einstein improved on it with his theory of General Relativity which account for errors in the predictions of Newton's formula close to very large masses. Newton's explanation remains in use to this day for situations that do not involve relativistic effects.

Additional info:

Newton discovered that matter created a velocity field V around matter, V2= GM/r.

This is different than Einstein's General Relativity idea of warping space. Newton's idea of the velocity field is the key to "Dark Energy" and the reason that the earth does not fall into the sun and the electrons do not fall into the Nucleus. The velocity field creates Momentum mV=P and also cP a vector energy! This vector energy is the so-called "Dark Energy". The vector energy cP creates the centrifugal force that holds the particles in orbit. The Divergence DEL.cP = -cp/r cos(P) is the centrifugal force that balances the centripetal force vp/r = mv2/r.

The Total Energy of Gravity is the sum of the scalar(potential) energy and the vector energy, together called Quaternion Energy:

W = -mGM/r + cmV = -vh'/r + cP = [-vh'/r, cP]

* h'=h/2pi and p=h/2pi r = h'/r

Newton's Laws of Force F and motion are

F = XW = [d/dr, DEL] [-vh'/r, cP] = [vh'/r2 - cDEl.P, cdP/dr + DEL -vh/r + cDELxP]

F = [vp/r - cp/r cos(P), -cp/r 1P + vp/r 1R + cp/r sin(P) 1RxP]

At Equilibrium force is zero and the Energy is Invariant and v=c at the Boundary.

This indicates the Universe is not expanding, the red shift is the Continuity Condition:

vp/r = cDEL.P = cp/r cos(P) gives v/c =cos(P). The earth has red shift v/c= 30k/300M = 1/10000 and the angle is 89 59' 39". this angle is the angle necressary to balance the centripetal gravity force with the centrifugal Divergence force.

The centripetal force is the scalar derivative of the scalar energy, the centrifugal force is the vector derivative of the vector Energy

Answer 3

He reasoned that if an apple falls off a tree there must be some attractive force. And there must be some corresponding force on the moon, which must therefore also be falling. So it must be travelling sideways fast enough to perpetually miss the Earth. Being aware of the dynamics of objects travelling in a circle (like a stone whirling on the end of a string) he was able to come up with his theory of gravity-controlled orbital motion which explained not only the motion of the moon, but of the planets also, and their apparently complex motions in the sky.

Answer 4

He realized that gravity was a inward pull and that everything has gravity. He also realized that the more mass something has, the more gravity it exerts.

Answer 5

that it exists