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26 Cards in this Set

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• Back
 force a push or a pull that causes changes in motion friction a force that works against motion gravity the attraction between you andearth gravitational force all objects in the universe pull on one another magnetic an object that attracts iron magnetic force the force exerted by a magnet balanced forces forces that act on an object but cancel eachother unbalanced forces forces in one direction are stronger, so they dont cancel eachother net force a combination of all the forces acting on an object buoyant force an upward force work using an object to move through a distance simple machine a tool that makes a task easier by changing the strength or direction of a force or the distance over which the force acts lever a bar that makes it easier to move things fulcrum a balance point wheel-and-axle helps you open a door pulley a wheel with a groove for a rope inclined plane allows you to use less force over a distance to make work easier position the location of an object in space, and it is always relative to a frame or reference speed the distance an object travels in a certainamount of time velocity the measure of an objects speed in a particular direction acceleration the rate at which velocity changes over time inertia the tendancy of objects to resist a change in motion vibration a back and forth movement of matter volume the loudness of sound pitch a sound of how high or low it is frequency the number of vibrations in a second