12.1 Vocab
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| force | a push or pull that acts on an object | ||||
| newton | the SI unit of force, equal to the force that causes a 1-kilogram mass to accelerate at a rate of one meter per second squared (1 N = 1k X m/s2) | ||||
| net force | the overall force acting on an object after all the forces are combined | ||||
| friction | a force that opposes the motion of objects that touch as they move past each other | ||||
| static friction | a friction force that acts on objects that are not moving | ||||
| sliding friction | a friction force that opposes the motion of an object as it slides over a surface | ||||
| rolling friction | a friction force that acts on rolling objects, caused by the change in shape at the point of rolling contact | ||||
| fluid friction | a friction force that opposes the motion of an object through a fluid | ||||
| air resistance | fluid friction acting on an object moving through the air | ||||
| gravity | the attraction between any two objects because of their masses | ||||
| terminal velocity | the constant velocity of a falling object when the force of air resistance equals the force of gravity | ||||
| projectile motion | the curved path of an object in free fall after it is given an inital forward velocity |
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Created by:
rkraimer14
on 2011-11-07