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Science Chp. 12.1

12.1 Vocab

QuestionAnswer
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
Created by: rkraimer14 on 2011-11-07



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