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sci voc
| Term | Definition |
|---|---|
| Acceleration | The rate at which velocity changes |
| Air resistance | The fluid friction experienced by objects falling through the air |
| Archimedes' Principle | The rule that the buoyant force on an object is equal to the weight of the fluid the object displaces |
| average speed | The overall rate of speed at which an object moves |
| balanced forces | Equal forces acting on an object in opposite directions |
| Bernoulli's principle | The rule that a stream of fast-moving fluid exerts less pressure than the surrounding fluid |
| buoyant force | The upward force exerted by a fluid on a submerged object |
| centripetal force | A force that causes an object to move in a circle |
| compound machine | A device that combines to or more simple machines |
| efficiency | The percentage of the input work that is converted to output work |
| fluid | A material the can easily flow |
| fluid friction | Friction that occurs as an object moves through a fluid |
| force | A push or pull exerted on an object |
| friction | The force that one surface exerts on another when two surfaces rub together |
| fulcrum | The fixed point at which a lever pivots |
| gravity | The force that pulls objects towards each other |
| inclined plane | A simple machine that is a flat, sloped surface |
| inertia | The tendency of an object to resit any change in its motion |
| lever | A simple machine that consists of a rigid bar that pivots about a fixed point |
| machine | A device that changes the amount of force exerted, the distance over which a force is exerted, or the direction in which force is exerted |
| mass | The amount of matter in an object |
| mechanical advantage | The number of times a machine increases a force exerted on it |
| momentum | the product of an objects mass in velocity |
| motion | the state in which one object's distance from another is changing |
| net force | the overall force on an object when all the individual forces are acting on it are added together |
| newton | a unit measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second |
| pascal | a unit of pressure equal to 1 newton per square meter |
| Pascal's principle | the rule that when force is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid |
| power | the rate at which work is done |
| pulley | a simple machine that consists of a grooved wheel with a rope or cable wrapped around it |
| reference point | a place or object used for comparison to determine if an object is in motion |
| rolling friction | friction that occurs when an object rolls over a surface |
| sliding friction | friction that occurs when a solid surface slides over another |
| speed | the distance an object travels per unit of time |
| static friction | friction that acts on objects that are not moving |
| terminal velocity | the greatest velocity a falling object can achieve |
| unbalance forces | forces that produce a nonzero net force, which changes an objects motion |
| velocity | speed in any given direction |
| wedge | a simple machine that is an inclined plane that moves |
| weight | a force of gravity on an object at the surface of a planet |
| work | force exerted on an object that causes it to move |
Created by:
huskie12
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