The students have been busy making their final adjustments to their ROVs.  Some of these adjustments ranged from minor design changes to a full re-design.  Below are some videos and images of students testing the performance (velocity and acceleration) of their ROVs using the Vernier LabQuest2 data collection devices and probes.  The sensors utilized are the photogate with pulley attachment.  In the first video, you will see that as the ROV moves, it pulls a string that causes the pulley to spin.  As the pulley spins, the photogate is able to measure changes in speed of rotation.  The LabQuest2 then crunches the data to produce graphs of position vs. time, velocity vs. time, and just about any other motion you ask for.

If the video wasn't clear, below is a picture of the display from one of the LabQuests after running a trial.

Students need to choose the appropriate graphs to display and then interpret their meaning.  Without the this technology, it would be very difficult for us to measure the acceleration and velocity of the ROVs.