There are three laws: 1. A body in motion remains in motion, and a body at rest remains at rest, unless some outside force acts on it. 2. A body's acceleration is directly proportional to the force applied to it, and the body moves in a straight line away from the force. 3. For every action, there is an equal and opposite reaction.

The three laws -- the Law of Inertia, the Force Law, and the Law of Action and Reaction -- elucidated by Newton, which govern the motion of objects in inertial reference systems.

laws that describe how the forces that act on an object relate to how that object moves. 1. An object in motion stays in motion unless acted on by an external force. 2. The acceleration of an object is proportional to the force applied to it and inversely proportional to its mass. 3. For every action, there is an equal and opposite reaction.

The fundamental laws of mechanics, which describe the effects of force on objects. Developed by Isaac Newton (1643-1727), the famous scientist, the three laws of motion state: First law: any object will remain in a state of rest or constant linear motion provided no unbalanced force acts upon it. Second Law: the rate of change of momentum is proportional to the applied force and occurs in the linear direction in which the force acts. Third Law: every actions has a reaction, which has a force equal in magnitude but opposite in its direction.

Three laws which form the foundation of classical mechanics, i.e. of the theory of ordinary motions (not motions on an atomic scale, covered by quantum mechanics, and not at velocities close to that of light, covered by relativity). The laws introduce the concepts of force and mass and state (in modern terms) In the absence of forces, an object ("body") at rest stays at rest, and an object moving in a straight line with constant velocity persists in doing so. A (small) body subject to a force accelerates; the acceleration is in the direction of the force and proportional to its magnitude, and inversely proportional to the mass of the body: F = ma. Forces are produced in pairs, in opposite directions and equal magnitudes. Newton's laws (2) and (3) in Mach's formulation reduce to:" When two small bodies act on each other, they accelerate in opposite directions and the ratio of their accelerations is always the same."

A set of three postulates first set forth by Sir Isaac Newton in the middle of the seventeenth century. According to the first law (the law of inertia), a body (point mass) remains at rest or in a state of uniform motion unless acted on by a force, where the position of the body is specified relative to an inertial reference frame. The second law states that the time rate of change of ( linear) momentum of a body is equal to the force on the body; Newton took momentum to be the product of mass and velocity, which is only an approximation valid at speeds much less than that of light. Finally, the third law states that if two bodies exert forces on each other, they are equal in magnitude and opposite in direction. Although apparently simple and unambiguous, Newton's laws have engendered considerable discussion over the extent to which some of them are mere definitions (e.g., of inertial reference frame, mass, and force) or are true laws in the sense of being subject to experimental verification. Despite the ambiguity of Newton's laws, they have proven to be an efficient way of describing the physical world (within limits) and form the basis for the equations of motion of fluids.

Newton's Laws of Motion are three physical laws which provide relationships between the forces acting on a body and the motion of the body, first formulated by Sir Isaac Newton. Newton's laws were first published in his work Philosophiae Naturalis Principia Mathematica (1687). The laws form the basis for classical mechanics.