[題目] 彈簧力
[領域]高中 (題目相關領域)
[來源]力 (課本習題、考古題、參考書...)
[題目]
一彈簧有彈力常數2N/m,其右端受力10N向右,另一端受力8N向左,
問其伸長量為?
[瓶頸] (寫寫自己的想法,方便大家為你解答)
有一說法是用10和8的平均力去解,所以答案得到4.5公尺(不確定是不是對的)
這題很明顯合力不為0
所以我也可以想成合力=2N向右,所以伸長1m,這樣不行嗎?(錯)
想請問到底上面兩作法,哪一個是對的?
還是都錯?
謝謝大家
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