G Project

Objective

Create new experiments for first semester Physics courses and write up a lab manual entries for them, which are clear and concise for execution.

Meeting

M-Th 1-3 PM in Room S-332

Students

Mentor(s)

Blog

The experiment begins

May, 18 2019


Today, we started with the initial trials for the new free-fall experiment setting up the experiment apparatus and shooting the video through different cell phone cameras. First off, we collected a few items that can be dropped from a height slightly higher than 2 meters.

We found a golf ball, a wooden ball and a small steel ball. In figure 1, you can see the slow motion video of the first trial taken using iPhone 7 with 720p and 240fps of the golf ball dropped from above the door height. Figure 2 shows the second trial taken using Samsung Galaxy S7 Edge with the same quality. We thought it was important to try taking the slow-motion video in different cell-phones because we were checking to see if it was feasible for students to take their own videos in class to perform the experiment. Now, we're going to try to use different apps and software such as PASCO that will allow the students to analyze the video and find measurements and other information for the calculations.

Pasco Capstone: Trials and Analyzing

May, 18 2019


In trials including a golf ball, steel ball, and wooden ball using both iPhone and Samsung cameras, the group found that the steel ball showed the most accurate value for acceleration due to gravity, 9.79 +/- 0.09 m/s2 while g for the golf ball was 9.41 +/1 0.10 m/s2.

This may be evidence that air resistance plays a part in the general error presented during the experimentation. Overall, the data found from these first few determinations showed that the experiment can be validated since the data is congruent with theoretical values and known values. In conclusion, further testing must be done to finalize the process for the experiment.