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Understand that the acceleration vector is in the direction of the change of the velocity vector. In one dimensional (straight line) motion, acceleration is accompanied by a change in speed, and the acceleration is always parallel (or antiparallel) to the velocity. When motion can occur in two dimensions (e. g. is confined to a tabletop but can lie anywhere in the x-y plane), the definition of acceleration is
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Understand that the acceleration vector is in the direction of the change of the velocity vector. In...
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