Question

define position vector

Answer 1

Position vector, straight line having one end fixed to a body and the other end attached to a moving point and used to describe the position of the point relative to the body..
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Answer 2

Position vector, straight line having one end fixed to a body and the other end attached to a moving point and used to describe the position of the point relative to the body. As the point moves, the position vector will change in length or in direction or in both length and direction.