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Key Terms: Chapter 3

Motion The state in which an object's distance from another object is changing.
Speed The distance an object travels in one unit of time.
Velocity Speed in a given direction.
Force A push or pull exerted on an object.
Net Force The overall force on an object when all the individual forces on an object are added together.
Unbalanced Force A net force that changes an object's motion.
Balanced Force Equal forces acting on an object in opposite directions
Friction The force that one substance exerts on another when the two rub against each other.
Acceleration The rate at which velocity changes.
Linear The term used to describe the relationship between variables whose graph is a straight line.
Nonlinear The term used to describe a relationship between variables whose graph is not a straight line.
Meter The basic SI unit of length.
Reference Point A place or object used for comparison to determine is an object is in motion.
Created by: tavakoliv