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Directions for Assembly of Accelerometer
A low-cost demonstrator accelerometer can be constructed out of dowel and a Zip-Loc bag. A frame consisting of four straws and four dowels slips into the bag, making it rigid. When filled with colored water, the water "slants," indicating acceleration.
- 20 inches of 1/4 inch dowel
- two pieces 5 1/2 inches long
- two pieces 4 1/2 inches long
- four flexible straws (those that bend)
- Zip-Loc freezer bag, pint size
Directions for Assembly:
- Fold two of the flexible straws in half. Cut the longer end of the straw even with the shorter end. These will be opposing corners of the frame.
- Cut the long end of the other two straws so that it is 3 3/4 inches long. These will be the other opposing corners of the frame.
- Insert dowel into the straws, forming a rectangle, and insert into the Zip-Loc bag.
The activity was presented by Jim Nelson at the 1999 AAPT/PTRA training workshop held in San Antonio, TX.
Activities Using the String Racer
Assembly Directions for String Racer