• 2021-04-14
    如图所示长2l的细直杆由钢和木两段组成,各段的质量各为和,且各为均质,问它们对z轴的转动惯量等于多少?/ananas/latex/p/377508/ananas/latex/p/377509/ananas/latex/p/83378650777368749f6789a71c4dcfacae51.png