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I have been set this question:

The instantaneous acceleration of a runner as she rounds the curve on a track is <-1.5 , 0.5> m/s2.What is the magnitude of the acceleration of the runner and what angle does this vector make with respect to the +x axis?

But I don't really understand what the question is asking for, and what the <-1.5 , 0.5> means...any help?

Thanks a lot

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# Homework Help: Vectors/Trigonometry Notation Problem

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