He cam up with the laws of gravity and motion.

He had three laws of motion. 

An object at rest will remain at rest unless acted on by another force.

An object in motion will remain in motion until acted upon by another force.

 The law says it takes more energy to move heavier things.

It also says that you need less energy to pick up a light thing.

The 2nd law helps us figure out how much pressure we put on an object.

Newton's 3rd law states that for every action there is a reaction 

His 3rd law means when you push an it object pushes back

Newton also came up with the law of gravity

force acting between any two objects in the universe