Fasten your phone to the dynamics cart.Open the science journal app, click '+' to start a new experiment, and click on linear accelerometer.Make a data table like the one in the photo.If you would like to give it a try, follow the instructions below. However, when I was testing out the lab, I found the app was not very accurate, possibly because I am using an old version.

Note: I designed the cart to be used with the accelerometer in Science Journal. If it is too tight, do some sanding if it is too loose, wrap some tape around the inner sliding component.ДЇirst of all, make a hypothesis! Will acceleration increase with angle? Will it be a linear relationship or otherwise? The two parts of the cart should slide together tightly, but still be adjustable. Depending on your 3D printer and/or whether you use skewers, you may have to do some sanding to make everything fit. Put the axes through the holes (they should spin freely), and stick the wheels on at the ends of the axes (this should be a tight fit).

Once it is done printing, you will have to remove all the supports, especially inside the holes. If your material warps easily, you probably should not print the axes. If you would like to make adjustments or design your own, click on the image above to view the design! A note for those who would like to do some tinkering: for a tightly fitting sliding parts, I used a gap of 0.15 mm on each side for loosely fitting parts, I used a gap of 0.4 mm on each side.ДЇor printing, I recommend using at least 50% infill density, and the use of supports. I designed a dynamics cart on Tinkercad to hold a smartphone (it's adjustable for size), and I've included the stl files for you to print.

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