[問題] 物理力學的一題
如圖片第七題 我標了一二兩種方法,但是結果卻不一樣。第一種是用正向力乘以摩擦係
數來算。第二種是直接用木棒重減半圓的正向力的分力。
請問一下我的思考哪裡有問題?
謝謝
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※ 編輯: teddyisgood (49.214.50.253), 06/17/2016 18:04:19
※ 編輯: teddyisgood (49.214.50.253), 06/17/2016 18:16:10
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