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Chapter 2 Forces
Term | Definition |
---|---|
force | a push or a pull |
newton | unit of measurement of force (SI unit) |
net force | the combination of all forces acting on an objects |
unbalanced forces | forces that produce a nonzero net force, which changed an object's motion |
balanced forces | equal forces acting on an object in opposite direction, doesn't move the object |
friction | the force that two surfaces exert on each other when they rub against each other |
static friction | a type of friction that acts on objects not moving |
sliding friction | friction that occurs when solid surfaces slide over each other |
rolling friction | friction that occurs when an object rolls over each other |
fluid friction | friction that results when an object moves through a fluid |
gravity | the force that pulls objects towards each other |
mass | measure of the amount of matter in an object |
weight | the force of gravity on a person or object on the surface of a plane |
air resistance | a type of fluid friction, usually has to do with moving through the air |