《自由落体运动》(普通高中课程标准实验教科书《物理·必修1》第二章第5节,人教社2006年12月第2版)一节中问题与练习第4题,题目是:频闪摄影是研究变速运动常用的实验手段.在暗室中,照相机的快门处于常开状态,频闪仪每隔一定时间发出一次短暂的强烈闪光,照亮运动的物体,于是胶片上记录了物体在几个闪光时刻的位 “Free-fall Movement” (Physical Education Compulsory 1 in Chapter 2, Section 5 of the General Senior High School Curriculum Standard Experimental Textbook, 2nd Edition, December 2006) Question 4 of the Questions and Exercises in the section titled: Frequency Flash photography is a commonly used experimental method to study variable speed motion.In the darkroom, the shutter of the camera is normally open, and the stroboscope emits a brief, intense flash at regular intervals to illuminate the moving object, so the object is recorded on the film. A few moments of flash bit