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例1一个底面积为100cm2,高为10cm的圆柱形容器,装满水后对桌面的压强为1200Pa.现用一弹簧测力计悬挂一金属块,轻轻浸入水中.当金属块浸没水中且静止不动时,弹簧测力计示数为4.8N.将金属块缓慢取出后,容器对桌面压强为1140Pa.(取g=10N/kg)求:(1)金属块浸没水中时,水对容器底面的压强.(2)金属块的密度.
Example 1 A cylindrical container with a bottom area of 100 cm 2 and a height of 10 cm filled with water and having a pressure on the table top of 1200 Pa. A spring force gauge is used to suspend a piece of metal and gently immerse it in water. At rest, the spring force gauge shows 4.8N. After slowly removing the metal block, the container pressure on the table is 1140Pa. (Take g = 10N / kg) Seeking: (1) When the metal block is immersed in water, Pressure on the underside of the container (2) Density of the metal block.