光电门计时方式对落球法测量重力加速度的影响INFLUENCE OF PHOTOELECTRIC GATE TIMING MODE ON MEASUREMENT OF GRAVITATIONAL ACCELERATION BY FALLING BALL METHOD
张凌语,翁存程
摘要(Abstract):
大学物理实验中通常采用落球法测量重力加速度,目前普遍认为电磁铁的剩磁和空气的阻力是影响该方法测量的主要因素,而光电门计时方式对测量的影响却一直被忽视。本论文研究了光电门计时方式对落球法测量重力加速度的两种方式的影响。研究表明了光电门计时方式对方式一的影响较大,增大小球下落的高度,测量误差会稍微减小,但是百分误差依然大于6%。光电门计时方式对方式二的影响较小,上方的光电门的位置距离小球下落的位置大于3.00cm,百分误差小于0.17%,光电门计时方式的影响可以被忽略。
关键词(KeyWords): 重力加速度;落球;光电门;测量
基金项目(Foundation):
作者(Author): 张凌语,翁存程
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