FPC Forces & Motion - Ch 12
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Created by:
mbrazo on March 4, 2008
Classes:
FPC 2 - Brazo, 7hills grade 8 science
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20 terms
Terms | Definitions |
|---|---|
 force | a push or pull that acts on an object |
| newton | the force that causes a 1-kilogram mass to accelerate at a rate of 1 meter per second each second |
| net force | the overall force acting on an object after all forces are combined |
| friction | a force that opposes the motion of objects that touch as they move past each other |
| static friction | the friction force that acts on objects that are not moving |
| rolling friction | the friction force that acts on rolling objects |
| fluid friction | the friction force that opposes the motion of an object through a fluid |
| gravity | the force that acts between any two masses |
| terminal velocity | the constant velocity of a falling object when the force of air resistance equals the force of gravity |
| projectile motion | the motion of a falling object after it is given an initial forward velocity |
| inertia | the tendency of an object to resist a change in motion |
| mass | the amount of matter an object contains |
| weight | the measure of the force of gravity on an object |
| momentum | the product of an object's mass and velocity |
| law of conservation of momentum | the total momentum of a closed system does not change |
| electromagnetic force | a force associated with charged particles, which has two aspects, electric force and magnetic force |
| strong nuclear force | a powerful force of attraction that acts only on the neutrons and protons in the nucleus, holding them together |
| weak nuclear force | a powerful attractive force that acts over a short range |
| gravitational force | an attractive force that acts between any two masses |
| centripetal force | a center-directed force that continuously changes the direction of an object to make it move in a circle |
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