Newton's Laws Of Motion

One, Two, and Three

First Law

The first law says that "every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it." witch means an object either is at rest or moves at a constant velocity, unless acted upon. For example in space an object will never move unless moved, and an object will never stop unless stopped.


Second Law

The second law states that "the relationship between an objects mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors; in this law the direction of the force vector is the same as the direction of the acceleration vector." Witch means acceleration of a body is directly proportional to, and in the same direction as, the net force acting on the body, and inversely proportional to its mass. For example if you flick a soccer ball and then kick a soccer ball the soccer ball will go farther when you kick it because more force is applied.


Third Law

In the third law it is said that "For every action there is an equal and opposite reaction". Witch means that When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction to that of the first body. An example of this is when a bird pushes air down while flying, since forces result from mutual interactions, the air must also be pushing the bird upward. This allows the bird to fly.