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Loaded hoop Fasten a small weight to the inside of a hoop and set the hoop in motion by giving it an initial push. Investigate the hoop¡¯s motion. ÔÚ»·ÄÚÊ©¼ÓÒ»¸öСµÄÁ¦£¬²¢¸øËüÒ»¸ö³õʼÉèÖÃÍÆ¶¯»·Ô˶¯¡£Ñо¿»·µÄÔ˶¯¡£ |
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