Divine Child High School Physics Lecture Section 2.2To truly represent motion, we need a Frame of Reference - Typically we take the point of view of a stationary observer. Our frame of reference can be thought of as a Coordinate System.Lets say I got in a helicopter and  flew 1000 m from the school. Would you know where I was? Distance is a Scalar. It includes Magnitude only. I could be anywhereon the circle. But if I said I went 1000 m south you'd know exactlywhere I was.1000 m south would be Displacement. Displacement is a Vector. Vectors include Magnitude and Direction.How do you indicate direction along a line? In physics we do this with sign. Positive and Negative are opposite directions. By convention, forward or right are positive while backwards or left are negative.

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