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發(fā)布時(shí)間: 2016-2-16 15:19
正文摘要:也許這個(gè)問(wèn)題很簡(jiǎn)單,但是還是請(qǐng)大神們幫幫忙,,看一下該怎么計(jì)算?在此謝過(guò)�,。� 我的理解是 5000*9.8*0.005(滾輪與軌道的摩擦系數(shù))=245 N 不知道對(duì)不,? 補(bǔ)充內(nèi)容 (2016-2-17 08:23): 在補(bǔ)充一下參數(shù), ... |
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