Loaded Disc Rolling Uphill (1K10.50)
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A large disc has a lead weight hidden near one edge, so its center of mass is away from the center of the disc. If it is placed on an incline with the lead weight on the uphill side of the incline, it will roll uphill slightly because that lowers its center of mass.
Make sure that the side with the red paint is facing away from the class. Position the hidden weight slightly past "12:00" so that it rolls up the incline.
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