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Sliding Friction Friction that occurs when one solid surface slides over another. Ex.: pushing a dresser across the floor.
Rolling Friction Friction that occurs when an object rolls across a surface. Ex.: roller skates
Static Friction Friction that acts on objects that are not moving. Ex.: pushing a heavy object that is not moving.
Fluid Friction Friction that occurs as an object moves through a fluid (a gas or liquid) Ex.: swimming or an airplane flying
Speed The total distance divided by the total time. S= d/t The rate of an object's movement.
Velocity The total distance divided by the total time and a direction. Objects traveling at the same speed but in different directions are traveling at different velocities.
Force A push or pull.
Newton The SI unit of force.
Balanced Force When an object is not moving. There is a net force of 0.
Unbalanced Force When an object is in motion. There is a net force greater than 0.
Lubricant Reduces friction of an object.
Created by: Gthegenius