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acceleration a change in speed or direction,depends on the mass of an object and th force pushing or pulling the object.
average speed describes the movement for an entire trip by dividing distance by measured time.
force a push or pull,mass times acceleration.
friction the push or pull that opposes motion when two touching surfaces are sliding against eachother.
gravity a pull that every object exerts on every object and that pulls all things toward earth in the same way.
inertia resistance to a change in motion.
mass the amount of matter in an object.
scientific law a theory about the natural world that has been tested many times and produces the same results.
weight measure of how much earth's gravity pulls down on an object.
Created by: anguyen99