| A | B |
|---|
| Acceleration | Exists when the velocity of a particle changes with time. |
| Displacement | Movement of an object through a distance. |
| Force | A push or pull exerted by one object on another. |
| Gravity | A fundamental physical force between any two objects in the universe; as applied to the earth, the force that is responsible for the weight of objects. |
| Law of Gravitation | Governs the mutual attraction between bodies. |
| Newton's First Law | (The Law of Inertia) – Objects at rest tend to stay at rest, and objects in motion tend to stay in motion at a constant speed in a straight line unless acted upon by an unbalanced force. |
| Newton's Laws | Common reference to the three laws of motion. |
| Newton's Second Law | The net force acting on an object in a given direction is equal to the mass of the object multiplied by the acceleration of the object in the same direction as the net force. |
| Newton's Third Law | The force of one object (object 1) acting on another object (object 2) is equal in magnitude and opposite in direction to the force of the second object acting upon the first. |
| Particle | A body of negligible dimensions or when the dimensions of a body are irrelevant to the description of its motion. E.g. an airplane wing vs. the flight from NY to LA. |
| Velocity | The ratio of the displacement of a particle and the time interval |
