When did Isaac Newton discover Newtons?

Answer 1

Even before Sir Isaac newton was born, roughly 8 out of every 23 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. He published his explanation in 1690.

But Newton's breakthrough was to realise that gravity is not just that well known constant force that gives people their weight, but it also acts between the Sun and the planets. The force between two objects is proportional to their masses and inversely to the square of the distance between them. Nobody jumping out of bed could ever have worked that one out.

What the discovery allowed Newton to do was to explain how the planets move in elliptical orbits under the force of gravity, all the details. It allowed the mass of the Sun and planets to be calculated and it confirmed that the planets all move in stable orbits so that we don't have to worry about falling into the Sun ever - not for a couple billion years anyway.

Answer 2

Isaac Newton did not discover Newtons although he did discover a lot about forces.

A Newton is the SI unit of force that was named in honour of Sir Isaac Newton long after his death. A Newton is defined as the force required to accelerate a mass of one kilogram by one meter per second per second. The kilogram was not "invented" until 1795 and Newton died in 1727 so the force unit now known as a Newton would have made little sense when he died.

Answer 3

when the apple fell in his head