1J20.51 CHAIR ON PEDESTAL
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An upright chair is able to balance on a vertical rod because weights have been placed inside the legs, lowering its center of mass. (Disc 3-22, 37 sec.) |
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An upright chair is able to balance on a vertical rod because weights have been placed inside the legs, lowering its center of mass. (Disc 3-22, 37 sec.) |