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Stack #4624705
| Term | Definition |
|---|---|
| Displacement | The difference between the initial or, or starting; position . |
| Velocity | The speed and direction of a moving object. |
| Speed | A measure of the distance of an object travels in a given amount of time. |
| Vector | A quantity that has both magnitude and direction. |
| Reference point | The starting point you choose to describe the location, or position, of an object. |
| Position | A object's distance and direction from a reference point. |
| Motion | The process of changing position. |
| Acceleration | A measure of the change in velocity during a period of time. |
| Force | A push or a pull on an object. |
| Contact Force | A push or a pull on one object by another object that is touching it. |
| Newton''s 2nd law | The acceleration of an object equals the net force on the object divided by the object's mass. |
| Friction | A force that resists the sliding motion of two forces that are touching. |
| Free-body diagram | A simple model to understand systems of objects with any amount of applied forces. |
| Net Force | The sum of all the forces acting on an object. |
| Newton's first law | An object in motion will staying motion, and an object at rest will stay at rest unless acted by a force. |
| Newton's 3rd law of motion | When an object applies a force on another object, the second object applies force of the same strength on the first object, but the force is on the opposite direction. |
| force pair | the forces two object apply to each other |
| normal force | the force that pushes perpendicular to the object's surface |
| elastic collision | when colliding objects bounce off each other |
| inelastic | when objects collide and stick together |
| noncontact force | a force that one object cannot apply to another without touching it |
| gravity | an attractive force that exists between all objects that have mass |
| field | a region of space that has a physical quantity (such as a force) at every positiob |
| weight | the gravitational force exerted on an object |
| inertia | the inherent resistance of any physical object to a change in its state of motion or rest, fundamentally measured by its mass |