Forces A push or pull on an object that can result in a change in shape, direction or velocity of the object. FORCE The force that opposes motion and is caused by rubbing. FRICTION The amount of speed in a certain direction. VELOCITY When a deforming force is removed an object will return to its original shape. ELASTICITY The force that attracts all objects toward the center of the earth. GRAVITY The weight of an object to be moved. RESISTANCE A inward center seeking force CENTRIPETAL The force that pulls outward and away from the center. CENTRIFUGAL Stored energy as a result of doing work on an object by raising it’s position. POTENTIAL ENERGY The energy of motion. KINETIC ENERGY A change in velocity. ACCELERATION Force applied on an object through a distance. WORK The product of the mass of an object times it velocity. MOMENTUM The tendency of a body to resist a change in its rest or motion. The tendency of an object to keep on doing what it is doing. INERTIA The force that is exerted or applied on a object. EFFORT A twisting or turning force. TORQUE A state in which 2 opposing forces are in balance and the result is equal to 0. EQUIL IBRIUM Amount of matter in an object. MASS The ability to do Work ENERGY Measure of the pull of gravity on an object. WEIGHT Forces FORCES AND MOTION THE END