| A | B |
|---|
| acceleration | A change in velocity. |
| ballistics | The study of objects moving through the air or moving through space, or projectiles. |
| contact force | A force which is applied by an object touching another object. |
| deceleration | Slowing down. An acceleration in which the velocity gets slower. |
| energy | The ability to do work. |
| entropy | The production of heat in every energy change. The gradual "winding down" of the universe. |
| field force | Force which act on objects without touching them. Examples are magnetism, gravity, and the electrical force. |
| force | A push or pull on an object caused by another object. |
| gravity | A field force between objects made of matter which attracts the objects. |
| inertia | Matter's tendency to resist changes in motion. |
| kinetic energy | The energy of a moving object. |
| momentum | The combination of an object's mass and its velocity. |
| physicist | A scientist who studies the ways matter and energy act. |
| potential energy | Stored energy of an object. |
| power | The rate at which work is done. |
| projectile | An object which shoots through the air (or through space). |
| vector | An arrow which shows direction and speed at the same time. |
| velocity | The speed of an object and the direction in which it is moving. |
| work | What is done when a force moves an object. |
| mass | The amount of matter in something. |
