推 rogerfd:因為掉下來的時候還有衝量要考慮,力不是單純的F=KX 11/04 16:21
※ 引述《chenkaihsu (Shrek)》之銘言:
: A 65kg bungee jumper leaps from a bridge.
: She is tied to a bungee cord that is
: 12 m long when unstretched, and falls a total of 31m .
: Calculate the spring constant k of the bungee cord assuming Hooke's law
: applies.
: 我ㄉ解法是 (31-12)/65*g這樣錯了嗎??答案不是這個耶......幫我解釋一下??
為什麼不能用F=KX解??
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