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2012年的苏州物理中考试题选择题的最后一题,学生普遍反应看不明白,束手无策.原题.水平地面上竖直放有一实心铜圆柱体,它对水平地面的压强为p1,在它底部中央开孔后,它对水平地面的压强为p2.孔的形状和大小如图1所示,其中EFGH为底部孔口.孔的形状和大小与按图2所示对称切割正方体形成的几何体的形状和大小一样(具体方法是沿四边形ABFE
2012 Suzhou Physics test questions multiple choice questions the last question, students generally do not understand, helpless. The original horizontal horizontal ground placed a solid copper cylinder, it is the pressure on the ground level p1, at the bottom of it The center of the hole, it is horizontal pressure on the ground p2. Hole shape and size as shown in Figure 1, which is the bottom hole EFGH hole shape and size and as shown in Figure 2 symmetrically cut cube formed geometry Shape and size of the same (the specific method is along the quadrilateral ABFE