By: Christian Garcia
Isaac Newton’s second law of motion states that the greater the mass the greater amount of force needed to accelerate the object. Acceleration happens when a force is applied to an object. We use this law everyday without knowing it. For example if I push a ten pound medicine ball it requires a greater force than pushing a marble. The mathematic equation for this law is force equals mass times acceleration.
Newton’s third law of motion is for every action there is an equal and opposite reaction. This means when there is a force applied there is an opposing force equally as strong. So when you push any object that object pushes back. This is Newton’s third law of motion.
Newton discovered gravity when he saw an apple fall from a tree. According to his second law there had to be a force to make the apple go down. He decided to call this gravity. Then he thought what if the apple tree was twice as tall? Then gravity would reach up there too. That is how Sir Isaac newton discovered gravity.
The result of Newton's research was his seminal work published in 1687, the Principia, considered by many as the greatest science book ever written.
Across the pages of the Principia, Newton breaks down the workings of the solar system into "'simple"' equations, explaining away the nature of planetary orbits and the pull between heavenly bodies. In describing why the moon orbits the earth (it's because the Earth is so much heavier), the book literally changed the way people saw the universe.