Moments, centre of mass

2010-06-06 5:33 am

回答 (1)

2010-06-06 6:59 pm
✔ 最佳答案
Please see the following:

圖片參考:http://img526.imageshack.us/img526/2903/58752898.png


2010-06-06 10:59:50 補充:
http://img526.imageshack.us/img526/2903/58752898.png


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