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Line 24: While rattleback [[Artifact (archaeology)\|artifact]]s are described as stone with various measurements, most which are sold currently as novelty puzzles and toys are described as plastic with measurements of 3.75-inches length x 0.75-inches width x 0.4375-inches height. Carved wooden rattlebacks are described with a measurement of 5.5-inches to 6-inches length. One plastic rattleback made and sold by Charles W. Sherburne is described with a measurement of 12-inches length. Glass rattlebacks, and those made of spoons, are described as being tested with unreported measurements. Larger rattlebacks, and those of other materials, aren't yet reported. Two rattleback-design types exist. They have either aan asymmetrical base where its rolling axis is skewed, or symmetrical base, with off-set weighting at the ends. ==Physics==

Rattleback: Difference between revisions