[問題] 請問二題物理
如圖一我動量守恆是用下面那一條式子,
但是答案卻是上面那一條。請問我錯哪裡?sorry我寫錯了下面的式子是
mvcosθ=M(-u) 不是小m
另外
http://i.imgur.com/4xW67Gp.jpg
圖二這題卻是用我圖一的第一式
請問有何不同
還有一題是104物理的11題,彈簧壓縮後釋放彈性位能我覺得彈簧會向左右兩邊
彈出,請問是哪裡觀念錯了?
謝謝各位幫忙 祝金榜
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※ 編輯: teddyisgood (180.205.139.33), 06/09/2016 20:43:54
※ 編輯: teddyisgood (180.205.139.33), 06/09/2016 20:44:26
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