如图所示a.b为两个靠得很�的小球均可视为质点静止放于倾角为30°的光�斜面上斜面足够长在释放b球的同时将a球以初速度2ms水平 Template




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tomski如图所示a.b为两个靠得很�的小球均可视为质点静止放于倾角为30°的光�斜面上斜面足够长在释放b球的同时将a球以初速度2ms水平 coloring