[請益] 國中理化 彈簧
[問題] A和B兩彈簧秤垂直掛在天花板下
A掛在上方,B掛在A的下方
但A為正掛,B為倒掛
兩彈簧秤重量皆為20gw
試問A和B兩彈簧秤讀數各為多少?
[答案] A彈簧秤讀數為20gw,B彈簧秤為0~20gw
[想法] A彈簧秤下方承受B彈簧秤的重量,故讀數為20gw
但B彈簧下方並未掛任何物體,讀數應為0gw
為何B答案為0~20gw呢?
煩請各位不吝賜教,這題我想了好久,還是摸不出頭緒
感激不盡!
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