Newton's First Law of Motion (Law of Inertia): Every body continues in its state of rest or of uniform speed in a straight line unless it is compelled to change that state by forces acting on it.
Newton's Second Law of Motion: The acceleration of an object is directly proportional to the net force acting on it and is inversely proportional to its mass. The direction of the acceleration is in the direction of the applied net force.
Newton's Third Law of Motion (Law of Action-Reaction): Whenever one object exerts a force on a second object, the second exerts an equal and opposite force on the first.