小明想探究弹性势能的大小与哪些因素有关.她选用材料不同的两根弹簧a和b光�轨道物块a等器材进行实验.如图所示用物块将弹簧压缩到一定程度后 Template




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tomski小明想探究弹性势能的大小与哪些因素有关.她选用材料不同的两根弹簧a和b光�轨道物块a等器材进行实验.如图所示用物块将弹簧压缩到一定程度后 coloring