| A | B |
|---|
| Force | A push or a pull on an object |
| Force formula | Force = Mass * Acceleration |
| Newton | The unit for force symbolized by N |
| Friction | The force that occurs when two surfaces move past each other |
| Earth's gravity | The force that pulls objects towards the center of the Earth |
| Space gravity | The pull or attraction that an object like the Earth exerts on other objects. The strength depends on the masses of the object and the distance between them |
| Weight-common usage | A measure of how something is.(the same as mass) |
| Weight-Scientific usage | The measure of the gravitational force acting on an object, measured in Newtons. |
| Weight - formula | Weight = mass * gravity |
| Terminal velocity | When air resistance matches the force of gravity and the object falls at a constant velocity |
| Projectile motion | The curved path an object follows when thrown or propelled near the Earth's surface |
| Spring Scale | an instrument that measures force in Newtons |
| Mass | The fundamental concept meaning "How much matter there is in an object" |
| rolling friction | The resistance to an object rolling across a surface, such as a ball rolling across a court or a tire rolling across the ground. |
| sliding friction | Sliding friction is when two solid surfaces slide against each other. Putting a book flat on a desk and moving it around is an example |
| fluid friction | The friction between a solid object as it moves through a liquid or a gas. The drag of air on an airplane or of water on a swimmer are two examples |
| normal force | the force perpindicular to a surface that prevents an object from falling through the surface. |
| force diagram | a picture representation of the forces acting on an object |
| net force | the combination of all the forces that act on an object |
| applied force | a general push or a pull acting on an object |
