Newton's Laws

An object has a tendency to stay at rest or in motion with the same speed and direction if it is not acted upon by an unbalanced force. The resistance of an object to change its state of motion (velocity and acceleration) that depends on mass is called inertia. Newton's first law would mean that an object would move on forever if nothing else pushes on it. But why is it that when you push something on a desk it eventually stops? This is because of friction, it too is a force and causes the book to stop.

Newton's Second Law

It has to do with the motion of objects whom have no equal and opposite opposing forces. They are unbalanced forces acting on it, which can change both speed and direction. The law states that: "The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force and inversely proportional to the mass of an object". The equation is :

Newton's Third Law

This law states that with every action, there is an equal and opposite reaction. An object will have a equal size of force compared to that of another object's size of force. So in Newton's third law, there are action-reaction forces. The action force is the force that causes an action and the reaction force is the force that causes the reaction. An action force can be an applied force and a reaction force can be the force of friction, and they will be equal to each other. This diagram describes the action-reaction forces.