关于气垫导轨上测量滑块加速度方法的改进

Improvement on the measuring technique of the slide acceleration on the air cushion guide rail

通过多次实验和理论分析发现,高中物理教材利用公式a=v22-v12/2s计算气垫导轨上滑块加速度存在的误区,利用作匀变速直线运动的物体一段时间内的平均速度等于中间时刻的瞬时速度,a=2s(t1-t2)/(t1+t2)t1t2用改进方法测量气垫导轨上滑块的加速度并进行了对比分析。

Through many tests and on the theoretical analysis,the author discovers that some mistakes existe in the high school physics textbooks which use the formula to compute the slide acceleration of the air cushion guide rail and it makes the average velocity of the uniform and non-uniform linear motion of an object in a period of time be equal to the instantaneous velocity of the middle time.Then on the formula improvement,the author obtains and analyzes the measuring technique of the acceleration.