假设实心球体在空中下落时受到空气阻力大小正比球体半径与球体速度的乘积.现有实心木球甲乙和实心铁球丙从高空由静止下落如图所示三球的半径关系 Template




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tomski假设实心球体在空中下落时受到空气阻力大小正比球体半径与球体速度的乘积.现有实心木球甲乙和实心铁球丙从高空由静止下落如图所示三球的半径关系 coloring