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ch. 10 forces

science

QuestionAnswer
force push or pull
newton the si unit for the magnitude or strength of a force
net force the combination of all forces on a object
unbalanced forces when ever there is a net force acting on a object
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 friction that occurs when an object isn't moving
sliding friction occurs when two solid surfaces slide over each other
rolling friction when a object rolls across a surface
fluid friction occurs when a solid object moves through a fluid
gravity a force that pulls object toward each other
mass the measure of amount in an object
weight the gravitational force exerted on a person or object at the surface of a planet
free fall when the only force acting on a object is gravity
air resistance a type of fluid friction that acts \on a object falling through air
projectile an object that is thrown
compression an elastic force that squeezes or pushes matter together
tension an elastic force that stretches or pulls matter
inertia the tendency of an object to resist a change in motion
momentum characteristic of a moving object that depends on both the mass and velocity of the object
law of conservation of momentum in the absence of outside forces the total momentum of objects that interact does not change
Created by: sarah quezada