# Newton's 3 Laws Of Motion

## Newtons First Law

Newton's First Law states that "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." Objects tend to "keep on doing what they're doing." In fact, it is the natural tendency of objects to resist changes in their state of motion. This tendency to resist changes in their state of motion is described as inertia.
Newton's First Law.MP4

## Newtons Second Law

Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.
Newton's 2nd Law of Motion

## Newtons Third Law

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Force always come in pairs - equal and opposite action-reaction force pairs.
Newton's Third Law: Physics in action with a skateboard and a makeshift rocket

## Review the laws

Newton's Song - Taylor Swift Cover by Sara Bryan

## Motion

The physics of motion is all about forces. Forces need to act upon an object to get it moving, or to change its motion.