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# chapter 10

force a push or pull exerted on a object
newton the SI unit used for the magnitude, or strength, of a force
net force the overall force on an object when all the individual forces acting on it are added together
unbalanced forces forces that cause an object's velocity to change
balanced forces equal forces acting on an object in opposite directions
friction the force of two surfaces rubbing together
static friction friction that acts on objects that aren't moving
sliding friction when to solid surfaces slide over each other
rolling friction an object that rolls across a surface
fluid friction when a solid object passes through water
gravity a force that pulls objects toward each other
mass the amount of matter an object has
weight the gravitational pull on a person or object
free fall when the only acting on a object is gravity
air resistance a type of fluid friction that acts on objects falling through the air
projectile an object that is thrown
compression an elastic force that pushes matter together
tension the elastic force that pulls matter apart
momentum the product of an object's mass and velocity
law of conservation of momentum the rule that in the absence of outside forces the total momentum of objects that interact does not change
inertia the tendency of an object to resist any motion
Created by: blundy616956