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Forces & Motion
Vocab
| Question | Answer |
|---|---|
| Displacement | The difference between the starting(initial) position and the final position. |
| Speed | A measure of the distance an object travels in a given amount of time. |
| Velocity | The speed and direction of a moving object. |
| Vector | A quantity that has both magnitude and direction |
| Acceleration | A measure of the change in velocity during a period of time |
| Force | A push or pull on an object |
| Contact force | A push or pull on one object by another object that is touching it. |
| Newton's 2nd law | When an object applies a force on another object, the second object applies a force of the same strength on the first object but the force is in the opposite direction. |
| Friction/ | A contact force that resists the sliding motion of two surfaces that are touching |
| Free-body diagram | A simple model to understand what will happen to an object due to a force |
| Net force | The combination of all the forces acting on an object |
| Newton's first law | An object at rest will stay at rest, and an object in motion will stay in motion unless a force acts on the object |
| Inertia | An object's ability to resist any change in motion. |
| newton's 3rd law | Every action has a equal and opposite reaction |
| force pairs | Consists of two simultaneous, equal-magnitude, and opposite-direction forces that occur when two objects interact |
| normal force | The support force exerted by a surface perpendicular (normal) to an object resting on it |
| elastic collision | A type of collision where both total kinetic energy and total momentum are conserved |
| inelastic collision | A collision in which the total kinetic energy of the colliding objects is not conserved (i.e., it decreases), though momentum is conserved |
| Non- contact force | A force that one object can apply to another object 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 force) at every point. |
| Weight | The gravitational force exerted on an object. |
| Motion | The process of changing position. |
| Reference point | The starting point you choose to describe the location, or position, of an object. |
| Position | An object's distance and direction from a reference point. |
Created by:
user-2020871