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Date Posted: 07:40:10 09/28/00 Thu
Author: Esther
Author Host/IP: imspntt06.netvigator.com / 208.139.96.29
Subject: AL----固體

鋼線和銅線的長度都是1.5m,截面直徑都為1mm,現把兩根線連接在一起,即構成復合的金
屬線
1)若兩線串聯,試求將復合線拉長0.5mm所需的力

答案是20.3N

我不明白是點計..............我把鋼及銅的力分開來計........即鋼及銅同樣伸長了
0.25mm................但是是錯的......我想問我這樣想是否錯....但是我是知道他們的伸長量是不一樣.........
那又是怎樣計..............

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