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Friction The force that one surface exerts on another when the two surfaces rub against each other.
Static Friction Friction that acts an 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 Friction that occurs as an object moves through a fluid.
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 its gravity.
Air Resistance The fluid friction experienced by objects fall 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.
Created by: topkkat