- Sir Isaac Newton made 3 fundamental laws that are very important when calculating and researching physics.
Newton's 1st Law
- if an object has no forces acting upon it, it will keep it's velocity and direction.
- This means that if an object has no forces acting on it then it will either stay still or continue in the same velocity and direction that it was already moving.
- This rule only really applies in given examples or in a vacuum, as objects constantly have forces acting on them on Earth.
Newton's 2nd Law
- F = ma
- Newton's second law states that forces can be found by multiplying mass and acceleration.
- The unit for force is called Newtons, named after Isaac Newton himself.
Newton's 3rd Law
- Newton's third law states that every force has an equal and opposite reaction. This means that any force applied is met by an equal force facing the opposite direction.
- For example if you punch a wall with a force of 20 newtons, then the wall hits you back with 20 newtons.
- Another example could be a book on a table. If the book weighs 10 newtons, then it would have to be pushed up by a force of 10 newtons by the table.