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- W2034622742 abstract "Here, we show the possibility of analysing circular motion and acceleration using the acceleration sensors of smartphones. For instance, the known linear dependence of the radial acceleration on the distance to the centre (a constant angular frequency) can be shown using multiple smartphones attached to a revolving disc. As a second example, the decrease of the radial acceleration and the rotation frequency due to friction can be measured and fitted with a quadratic function, in accordance with theory. Finally, because the disc is not set up exactly horizontal, each smartphone measures a component of the gravitational acceleration that adds to the radial acceleration during one half of the period and subtracts from the radial acceleration during the other half. Hence, every graph shows a small modulation, which can be used to determine the rotation frequency, thus converting a 'nuisance effect' into a source of useful information, making additional measurements with stopwatches or the like unnecessary." @default.
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- W2034622742 date "2014-03-01" @default.
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- W2034622742 title "The spinning disc: studying radial acceleration and its damping process with smartphone acceleration sensors" @default.
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- W2034622742 doi "https://doi.org/10.1088/0031-9120/49/2/137" @default.
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