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Rolling “Down”

This video is fairly self-explanatory but it is useful to have an understanding of where the centre of mass of each object is. Asking the students to explain what is going on in this video using diagrams, models and words might be a useful exercise to test their understanding of centre of mass and also if they understand the concept of objects trying to attain their lowest potential energy state i.e. stability. You might also get them to define "down" as well.

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