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# Forces

TermDefinition
Force A push or a pull
Newton The SI unit of magnitude,or strength, of force
Net Force The combination of all forces acting on an object
Unbalanced Forces Cause the velocity of an object 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 Friction that acts on objects that are not moving.
Sliding Friction When two solid surfaces slide over each other.
Rolling Friction When an object rolls across a surface.
Fluid Friction When a solid object moves through a fluid.
Gravity A force that pulls objects toward each other.
Mass The measure of the amount of matter 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 an object is gravity.
Air Resistance A type of fluid friction that acts on objects 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 A characteristic of a moving object that depend on both the mass and the velocity of the object.
Law of Conservation of Momentum States that in the absence of outside forces the total momentum of objects that interact does not change.
Satellite Any object that orbits another object in space.
Centripetal Force Any force that causes an object to move in a circular path.
Created by: alondraharo