铁的密度是7.8*10^3kg/立方米.
压力F=7.8kg*9.8N/kg=76.44N,牛顿
压强P=F/受力面积=F/100平方厘米=76.44N/0.01平方米=7644Pa,帕斯卡.
边长为10cm的正方形实心铁块放在面积为0.5平方m的水平桌面中央
边长为10cm的正方形实心铁块放在面积为0.5平方m的水平桌面中央
求铁块对水平桌面的压力和压强
求铁块对水平桌面的压力和压强
其他人气:785 ℃时间:2019-09-27 18:51:44
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