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衡水金卷先享题2024答案调研卷(广西专版物理试卷答案试卷答案

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衡水金卷先享题2024答案调研卷(广西专版物理试卷答案第一部分

15.(18分)如图所示,倾角为θ的光滑斜面体固定在水平面上,斜面底端固定一挡板。三个相同θ的小物块A、B、C,质量均为m,小物块A紧靠挡板放置,小物块A和小物块B通过劲度系数kk=mg2L的轻质弹簧相连,开始时A、B均静止。现让小物块C沿斜面从小物块B上端L处由静止释放,小物块B、C碰后一起向下运动(未粘连),当B、C再次分离后撤去小物块C。为弹簧的劲度系数,x为弹簧的形变量,重力加已知弹簧的弹性势能可表示为Ep=12kx^2,k速度为g。(1)求小物块B碰后瞬时速度的大小;(2)求小物块B向下运动的最大位移;(3)现让小物块C沿斜面从小物块B上端另一位置由静止释放,若小物块B沿斜面向上运动到最高点时,小物块A恰好离开挡板,求小物块C开始下落时距小物块B的距离。

衡水金卷先享题2024答案调研卷(广西专版物理试卷答案第二部分（待更新）

16.(8分)某小组做测量光学透明矩形元件的折射率实验,所用光学元件上、下边缘间距为8cm,光路图如图①所示,直线aa^'、bb'分别与该光学元件上、下边缘所在直线重合,N为光线在元件上边缘的人射点,NN'为过上边缘入射点的法线,N^'为法线与bb'的交点,入射角为=53^,,折射角为B,4为光线在元件下边缘的出射点,,AN'=6cm,53^=0.8,53^=0.6,1213=34.8,637=25.2。(1)求该光学元件的折射率(结果保留两位有效数字);(2)图②为甲同学计算折射率时作出的图像,其中bb‘在元件的实际下边缘下方1cm处。图③为乙同学计算折射率时作出的图像,其中,bb^3在元件的实际下边缘上方1cm处。求甲、乙两同学计算出的折射率之比(结果保留两位有效数字)。