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# Forces

TermDefinition
Force A push or pull exerted on an object
Newton A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second
Net Force The overall force on an object when all the individual forces acting on it are added together
Unbalanced Force Forces that produce a nonzero net force, which changes an object’s motion
Balanced Force Equal forces acting on an object in opposite directions
Friction The force that one surface exerts in another when the two surfaces rub against each other
Static Friction Friction that acts on objects that are not moving
Sliding Friction Friction that occurs when one solid surfaces slides over another
Rolling Friction Friction that occurs when an object rolls over a surface
Fluid Friction Friction that occurs as an object moves through a liquid
Gravity The force that pulls objects toward each other
Mass A measure of how much matter is in an object
Weight A measure of the force of gravity on an object
Free Fall The motion of a falling object when the only force acting on it is gravity
Air Resistance The fluid Friction experienced by objects falling through the air
Projectile An object that is thrown
Compression The part of a longitudinal wave where the particles of the medium are close together
Tension Stress that stretches rock so that it becomes thinner in the middle
Inertia The tendency of an object to resist any change in its motion
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
Satellite Any object that orbits around another object in space
Centripetal Force A force that causes an object to move in a circle
Created by: rdrodriguez2003