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题目 (福州市2002年中考题第34题):如图1所示,正方体木块漂浮在水面上,有总体积的1/5露出水面,不可仲长的悬绳处于松驰状态.已知绳子能承受的最大拉力为5N,木块边长为0.1m,容器底面积为0.03m~2,容器底有一阀门 K.求:(1)木块的密度;(2)打开阀门使水缓慢流出,当细绳断裂前一瞬间关闭阀门,此时木块排开水的体积为多少?(3)在细绳断后木块
Topic (Fuzhou City 2002 Exam Question No. 34): As shown in Figure 1, the cubes float on the surface of the water, with a total volume of 1/5 exposed to the water surface, and the medium-length suspension rope is in a relaxed state. The maximum tensile force the rope can withstand is 5N. The side length of the block is 0.1m. The bottom area of the container is 0.03m~2. There is a valve K at the bottom of the container. Find the density of the wood block. (2) Open the valve to make water slow Outflow, when the string closes, the valve closes immediately before it breaks. How much is the volume of water discharged from the block? (3) The block is broken after the string is broken.