← Balanced & Unbalanced Forces Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All Gravity An attraction between objects that have mass Friction A force between two objects in contact with each other that opposes motion Unbalanced forces Forces upon an object that cause the motion of the object to change Force A push or a pull on an object Acceleration A change in an object's velocity (speed or direction) over time Displacement Occurs when one object pushes away or takes the place of another object Balanced Forces Forces upon an object that cause no change in the object's motion Inertia object's resistance to change its motion velocity object's speed and direction at a given time motion describes movement by speed, velocity, & or accleration newton unit of measure when dealing with forces speed distance an object travels in a certain amount of time net force combination of all forces acting on an object