This experiment is done by dropping a ruler and measuring the distance the ruler falls On this experiment, the purpose of conducting the unman reaction time is as an example indirect measurement, where the direct measurements which is the distance the ruler is falling is calculated in order to calculate the indirect measurement which is the reaction time. The relationship Of this reaction can be derived when the motion is at constant acceleration. Vote h awe By = (O)t * Tight (initial velocity is O) by = h tat (g is gravitational acceleration) the average reaction time can be measured using the relationship, where s is the distance of the ruler falling, g is the gravitational force (g 9.
0) and its reaction time. Procedure 1. Each trial is begin with one student releasing the ruler from the upper end and another student catching the ruler initially after placing two fingers at the SO CM mark.