[考題] 尋問物理考題
※ [本文轉錄自 studyteacher 看板]
作者: david7689 (david77777) 看板: studyteacher
標題: [考題] 尋問物理考題
時間: Wed Oct 28 22:26:44 2009
一石頭自塔頂自由落下a米時,令另一石塊自離塔頂b米處自由落下,二塊同時著地
,求塔高
解答
設石頭自由落下a米需t1秒,若再經過t2秒著地且塔高為h
a=1/2gt1^2..........(1)
h-b=1/2gt2^2..........(2)
h =1/2g(t1+t2)^2.....(3)
答案 h=(a+b)^2/4a
1 我想問的是它的假設是好像是a=b但又覺得怪怪的
2 最後他如何算出h=(a+b)^2/4a
謝謝解答
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※ david7689:轉錄至看板 Teacher 10/28 22:30
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