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第三章 靜力平衡
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力學
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Wen Hao Lee
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Oct 4, 2012, 9:58:36 AM
10/4/12
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範例20
下面的挑戰題
求"斜面的正向力"
我已經把其他作用力都求出來了
我在算斜面上的正向力的時候是用拉密定理這樣列式的
W/sin75。=N/sin30。
算出來跟答案不一樣
費因曼客服
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Oct 5, 2012, 3:48:26 AM
10/5/12
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您好:
您列出的角度不對,請再算一下
Wen Hao Lee於 2012年10月4日星期四UTC+8下午9時58分36秒寫道:
Wen Hao Lee
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Oct 5, 2012, 9:45:19 PM
10/5/12
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找到了,N應該是對上60。
費因曼客服於 2012年10月5日星期五UTC+8下午3時48分26秒寫道:
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