2016年高考理科综合全国卷Ⅰ(乙卷)第35(2)原题如下.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,重力加速度大小为g.求: Item 35 (2) of the Integrated National Curriculum Ⅰ (Vol.) Of the College Entrance Examination for 2016 is as follows: There is a fountain next to the entrance of an amusement park where the sprayed water column hides a cartoon toy with a mass of M steadily in the air For convenience, it is assumed that the water column is sprayed vertically upwards from the spout of cross-sectional area S at speed v0; the bottom of the toy is a flat plate (area slightly larger than S); when the water column impacts the toy floor, the water velocity in the vertical direction becomes 0, in the horizontal direction spread evenly around the four. Ignore air resistance. Known water density ρ, the magnitude of gravity acceleration g.