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本文介绍在普通物理实验中测量加速度的一种精确方法。详细介绍了用气轨测量加速度的理论基础。研究了滑块宽度对测量结果的影响;在实验的基础上提出在现有装置条件下的测量条件。测量出我校所在地区的重力加速度为9.769米/秒~2,它和标准值相差0.23％。 气垫导轨是一种力学实验仪器,它可作多种实验测量,它的主要特点是平直的导轨表面和滑块之间形成一薄的空气垫层,利用这空气垫层作为润滑剂,减小摩擦力,使滑块成为“无摩擦”的运动,从而获得良好的实验较果。 本文的目的是从理论上推导出对有一定宽度的挡光片时,求加速度的修正公式,通过实验研究了滑块宽度对测量法结果的影响,为实验测量提供了理论依据,通过测量给出我校所在地区的重力加速度数值。
This article presents an accurate way to measure acceleration in normal physics experiments. The theoretical basis for measuring acceleration with gas rail is introduced in detail. The effect of slider width on the measurement results was studied. Based on the experiment, the measurement conditions under the existing device conditions were proposed. The gravitational acceleration measured in our school is 9.769 m / s ~ 2, which is 0.23% different from the standard value. Air cushion rail is a mechanical experiment instrument, it can be used for a variety of experimental measurements, its main feature is the straight rail surface and the slider between the formation of a thin air cushion, the use of this air cushion as a lubricant, minus Small friction makes the slider a “frictionless” movement, resulting in good experimental results. The purpose of this paper is to theoretically deduce the correction formula of acceleration when there is a certain width of the light blocking film. The influence of the width of the slider on the measurement results is studied experimentally, which provides a theoretical basis for the experimental measurement. The value of gravity acceleration in our school area.