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2016年高考全国卷Ⅰ理科综合试卷中,物理选修3-5部分考了这样一道题:题目.某游乐园入口旁有一喷泉,喷出的水柱将一质量为M的卡通玩具稳定地悬停在空中.为计算方便起见,假设水柱从横截面积为S的喷口持续以速度v0竖直向上喷出;玩具底部为平板(面积略大于S);水柱冲击到玩具底板后,在竖直方向水的速度变为0,在水平方向朝四周均匀散开.忽略空气阻力.已知水的密度为ρ,重力加速度大小
2016 National College Entrance Examination Volume I comprehensive examination papers, physical examination 3-5 part of the examination of such a question: the theme of an amusement park entrance next to a fountain, the jet of water will be a mass M cartoon toys stably hovering For convenience of calculation, it is assumed that the water column is sprayed vertically upward from the spout of cross-sectional area S at the speed v0; the bottom of the toy is a flat plate (area slightly larger than S); after the water column impacts the toy floor, Of the speed becomes 0, spread evenly in the horizontal direction around the four. Ignore the air resistance. Known water density ρ, the size of the acceleration of gravity