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Forces Vocabulary
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| Question | Answer |
|---|---|
| Momentum | the product of an object's mass and its velocity |
| Formula for Momentum | m=pv |
| Law of Conservation of Momentum | the total momentum of any group of objects remians the same unless outside forces also act on the objects |
| Force | a push or a pull that gives energy to an object |
| Units of Forces | forces are measured in Newtons; N |
| Net Forces | the total of all the forces acting on an object |
| Inertia | the tendency of matter to resist a change in its motion |
| Balanced Force(s) | the net forces acting on an object is zero |
| Unbalanced Force(s) | the net force acting on an object is not zero |
| Friction | a force that one surface exerts on another when two surfaces are in contact with each other |
| Static Friction | friction between non-moving objects |
| Kinetic Friction | friction between moving objects |
| Sliding Friction | friction between objects that slide (rub) against each other |
| Rolling Friction | occurs when an object rolls over a surface |
| Fluid Friction | occurs when an object moves through a fluid or a gas |
| Newton's First Law of Motion | objects at rest will stay at rest & objects in motion will stay in motion at a constant velocity unless acted on by an unbalanced force |
| Newton's Second Law of Motion | the net force acting on an object is equal to the product of the object's mass & acceleration |
| Newton's Third Law of Motion | for every action force there is a reaction force that is equal, but acts in the opposite direction |
| Law of Universal Gravitation | all objects in the universe are attracted to each other; strength of attraction depends on the objects' masses and distance from each other |
| Freefall | the motion of an object when GRAVITY is the only force acting on it |
| Terminal Velocity | greatest velocity of a falling object; occurs when the force of GRAVITY id EQUAL to the force of FRICTION |
| Weight | a measure of the force of GRAVITY on an object |
| Mass | the amount of matter in something |
| Centripetal Force | the force that is pulling an object in cicular motion towards the center of the circle |
| Geosynchronus Orbit | occurs when tha an object orbits another obeject at a rate equal to the second object's rate of rotation |
Created by:
alexanderwP2
on 2012-01-27