Here is the much anticipated result of our marble investigation. I was delinquent in getting pictures to go with my results. I have to have the pictures! If you missed the first post on our most excellent math lesson, then go to there and read about it. It was good science!!
The first thing the kids found was that it was hard to get the marble to repeat a good run enough times to record it for five trials in a row. They tried to get the marble to go around the curve correctly each time to no avail. Finally, they ended up making a new chart to record the partial runs. We could calculate the velocity whether or not the marble went all the way to the end of the track.
Also, before we could do calculations, we had to deal with the raw data. We chose to find the median rather than an average in order to do the velocity calculation.
We had trouble importing the video from E11’s camera into Picasa so for now the video of the run will wait. Next time… Aha! E11 just informed me that his camera card was not wiped so perhaps, with my help, we’ll load up some video for you. That was part of the challenge that day.
All in all a fantastic activity for math and science. I wonder what we’ll do next!