motion and forces
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Created by:
nilombrozo on May 28, 2012
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Description:
chapter 1+2
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20 terms
Terms | Definitions |
|---|---|
 tension | pulling force applied to an object that can make an object stretch. |
| inertia | the tendency of an object to resist a change in it's motion. |
| law of universal gravitation | all objects are attracted to each other and the force of attraction depends upon their masses and distance between them. (ex:planets) |
| net force | the combination of all the forces acting on an object. |
| friction | a contact force that opposes the movement between two surfaces in contact. |
| vector | a quantity with both size and direction. |
| kg | unit of mass used in Newton's second law of motion. |
| newton | unit for force-magnitude of a force. |
| non-content force | a force one object exerts on another when they are not touching. |
| contact force | exerted only when touching. |
| balanced forces | forces that combine to make net force of zero. |
| unbalanced forces | forced that don't combine to a net force of zero. |
| compression force | a squeezing force applied to an object that can make an object shrink. |
| normal force | a force exerted by an object that is perpendicular to the surface of the object. |
| static friction | the force between two surfaces in contact that keeps them from sliding when a force is applied. |
| elastic force | force exerted by a material when it is stretched or compressed. |
| centripetal force | circular motion perpendicular to the center of the circle. |
| Newton's first law of motion | If the net force of an object is zero, an object at rest remains at rest, or if the object is moving it continues to move in a straight line with constant speed. |
| Newton's second law of motion | the acceleration of an object equals the net force divided by the object's mass. |
| Newton's third law of motion | When one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object. |
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