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Jilliannn
science forces of motion
| Term | Definition |
|---|---|
| Acceleration | the rate at which velocity changes |
| air resistance | the fluid friction expirenced by objects falling through the air |
| Archimedes' priciple | 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; calculated by dividing the total distance an object travels by the total time |
| balanced forces | equal forces acting on an object in oppisite directions |
| Bernouilli's principle | the rule that a stream of fast moving liquid exerts less pressure than the surrounding fluid |
| bouyant force | the upward force exerted by a fluid on a sumerged object |
| centripetal force | a force that causes an object to movie in a circle |
| compound machine | a device that combines two or more simple machines |
| efficiency | the percentage of the input work that is converted to output work |
| fluid | a material that can easily flow |
| fluid friction | friction that occurs as ana object moves through a fluid |
| force | a push or pull exerted on an object |
| friction | the force that one surface exerts on another when the two surfaces rub against each other |
| fulcrum | the fixed point around where a lever pivots |
| inclined plane | a simple machine that is a flat, sloped surface |
| inertia | the tendency of an object to resist any change in its motion |
| lever | a simple machine that consists of a rigid bar that pivots about a fixed point |
| 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 and velocity |
| net force | the overall force on an object when all the individual forces acting on it are added together |
| pascal | a unit of pressure equal to 1 newton per square meter |
| pascals 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 one solid surface slides over another |
| speed | the distance an object travels per unit of time |
Created by:
jillianandrews
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