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# chapter 10 vocab

TermDefinition
force push or pull
newton the si unit for the magnitude or strength of force
net force the combination of all forces acting on an object
unbalanced forces force that causes objects velocity to change
balanced forces equal forces acting on one object in opposite directions
friction a force that two surfaces exert on each other when they rub against each other
static friction the friction that acts on objects that are not moving
sliding friction friction that occurs when one solid surface slides over another
rolling friction friction that occurs when an object rolls over a surface
fluid friction occurs when a solid object moves through a fluid
gravity a force that pulls objects towards each other
mass the measure of the amount of matter in an object
weight measure of the force of gravity on an object
free fall motion of a falling object when the only force acting on it is gravity
air resistance acts on objects falling through air
projectile an object that is thrown
compression an elastic force that squeezes or pushes matter together
tension elastic force that stretches or pulls matter
ineria tendency of an object to resist a change in motion
momentum characteristic mass x velocity (quantity of motion
law of conservation of momentum the absents of outside forces that total momentum of objects that interact does not change
third law of motion one object exerts force on a second exerts a force equal in the opposite direction
Created by: mpendleton