# Newton's 3 Laws of Motion

### Founded in 1687, and still used in everyday life today!

## Sir Isaac Newton was the founder of our 3 laws of motion!

It is believed that Isaac Newton started studying the effects of gravity after watching an apple fall, then he started experimenting, learned greater information about gravity, and then created the laws; The law's we know as the Law's of Motion.

## The Three Law's of Motion:

## Newton's 1st Law

An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

The behavior of all objects can be described by saying that objects tend to "keep on doing what they're doing" (unless acted upon by an unbalanced force). If at rest, they will continue in this same state of rest.

## Newton's 2nd Law

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

However, the Second Law gives us an exact relationship between force, mass, and acceleration. It can be expressed as a mathematical equation: F=MA

or FORCE = MASS times ACCELERATION

## Newton's 3rd Law

For every action there is an equal and opposite re-action.

This means that for every force there is a reaction force that is equal in size, but opposite in direction. That is to say that whenever an object pushes another object it gets pushed back in the opposite direction equally hard.

## An example for each of Isaac Newton's Laws:

## Newton's 1st Law An object in motion (the boy) tends to stay in motion unless acted upon by an outside force (the steering wheel). | ## Newton's 2nd Law Acceleration is produced when a force (the person) acts on the mass (of the car). | ## Newton's 3rd Law For every action (the person) there is an equal and opposite re-action (the boat) in which both tend to move.. |

## Newton's 1st Law

An object in motion (the boy) tends to stay in motion unless acted upon by an outside force (the steering wheel).

## Why are Newton's Laws important?

Newton's laws are very important because they tie into almost everything we see in everyday life. These laws tell us exactly how things move or sit still, like why you don't float out of bed or fall through the floor of your house. Newton's laws control how cars work, how water flows, how buildings don't fall down, and basically how everything around us moves.

It isn't always obvious how important these laws are, because to use them in complicated situations like getting ready for school, you need to know a lot of things, like the exact shape of your tube of toothpaste, how you squeeze on it, and what the toothpaste is made of. Newton's laws speak very generally all forces, but to use them for any specific problem, you have to actually know all the forces involved, like gravity, friction, and tension.

It isn't always obvious how important these laws are, because to use them in complicated situations like getting ready for school, you need to know a lot of things, like the exact shape of your tube of toothpaste, how you squeeze on it, and what the toothpaste is made of. Newton's laws speak very generally all forces, but to use them for any specific problem, you have to actually know all the forces involved, like gravity, friction, and tension.

## Here is a video that explains Newton's Law's a little more!

Newton's 3 (three) Laws of Motion