一根弹簧长50cm,一段固定,另一端可挂重物,通常所挂物体体质每增加1kg,弹簧伸长2cm,则弹簧长度为67cm是,
一根弹簧长50cm,一段固定,另一端可挂重物,通常所挂物体体质每增加1kg,弹簧伸长2cm,则弹簧长度为67cm是,
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物理人气：520 ℃时间：2019-10-19 13:48:01
优质解答
挂了8.5kg物体
我来回答
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