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範例:非固定體的鉛直面圓周運動

小木塊質量為m沿無摩擦的翻圈軌道滑行,如圖所示。若木塊在P由靜止起動,(1)Q處木塊的動能為多少? (2)Q處木塊作用於軌道之力為多少? (3)m到環頂時,m施於軌道之力為多少? (4)若欲使m恰可滑至環頂,m應從距底面多高處下滑?


[詳解]
非固定的鉛直面圓周運動動畫  [潘冠錡老師 製作]

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