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ASVAB Exam Cram™ by Kalinda Reeves, Karl W. Riebs

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Mechanical Motion

Mechanics is the branch of physics that deals with motion, and the same laws that govern the motion of a solar system also govern the motion of an airplane in flight and a baseball in flight.

All motion is relative to a reference point, and we use the term position to refer to the location of an object. When we give the position of an object, it is in relation to its reference point. When an object that is located in one position changes positions, then it has moved. When an object has a continuous change of position, the object is in motion. The moving object may be moving differently in relation to its reference, or not at all in relation.

For example, a book lying on a desk is seemingly motionless. In reference to the desk ...

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