Day 28: Focus group testing

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Today the team gathered volunteers again to test out the free-falling object experiment after last round of revisions (with the addition of new diagrams). Last time, the students had not been able to finish the entire experiment, hence, we were not able to test part three of the experiment: calculating the drag coefficient.

Again, revisions will be made to the lab manual entry based on the reactions and feedback. The volunteer finished analyzing the steel video today, and will continue from there tomorrow same time. Figure 1 shows a snapshot of the steel video analysis.

Figure 1.  Steel ball data.
As you see from the velocity vs time graph, the experimental acceleration is found to be 9.83 m/s2.

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