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23.附圖為一輪軸,其輪和軸的半徑分別為40公分與10公分,將一20公斤重的物掛於軸且施力F在輪上,欲將物體等速上拉,下列敘述何者錯誤? (A)施力時若輪轉一圈,則軸也會轉一圈(B)若要將物體抬起至少
問題詳情
23.附圖為一輪軸,其輪和軸的半徑分別為40公分與10公分,將一20公斤重的物掛於軸且施力F在輪上,欲將物體等速上拉,下列敘述何者錯誤?
(A)施力時若輪轉一圈,則軸也會轉一圈
(B)若要將物體抬起至少施力須施力5公斤重
(C)施力下拉2公分,物體會上升8公分
(D)此裝置屬於費时的簡單機械
參考答案
上一篇 :
13.以下有關於人類細胞的敍述,何者為是?(A)高基氏體可產生許多ATP,提供能量(B)細胞核是細胞中唯一有具有DNA的部位(C)溶小體可以提供細胞做為合成碳水化合物的場所(D)核醣體負責合成蛋白質
下一篇 :
1於馬公市區載客至鯨魚洞風景區應行駛(A)「縣203號」接「縣202號」(B)「縣204號」接「縣201號」(C)「縣203號」接「澎2號」道路。
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