NEWTON'S LAWS OF MOTION
Force and Motion
Newton's Laws of Motion Summary
Newton's First Law of Motion
An object remains at rest (if originally at rest) or moves in a straight line with
constant velocity if the net force on it is zero.
Newton's Second Law of Motion
A particle with a force acting on it has an acceleration proportional to the
magnitude of the force and in the direction of that force.
Newton's Third Law of Motion
The forces of action and reaction between interacting bodies are equal in
magnitude and opposite in direction.
- or -
For every action there is an equal and opposite reaction.
Newton's Universal Law of Gravitation
Each and every mass in the universe exerts a mutual, attractive gravitational
force on every other mass in the universe. For any two masses, the force is
directly proportional to the product of the two masses and is inversely
proportional to the square of the distance between them.
Newton's laws of motion are summarized below.