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某同学在探究“平抛运动”实验中，在白纸上记录了竖直方向，并作出小球平抛轨迹的部分拟合图线，但是没有记录平抛运动的起点，于是该同学以这段图线的起点作为坐标原点O，竖直向下方向为y轴正向，建立直角坐标系...
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高三下学期物理《》真题及答案
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在研究平抛物体的运动的实验中某同学只在竖直板面上记下了重锤线y的方向但忘记了平抛的初位置在坐标纸上描
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每次实验过程中，钢球必须从同一位置由静止滚下
实验装置中的斜面必须是光滑的
若已知钢球在竖直方向做自由落体运动，可以探究钢球在水平方向上的运动规律
若已知钢球在水平方向上做匀速直线运动，可以探究钢球在竖直方向上的运动规律）
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