Answers edited by njolee
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A model train, with a mass of 4 kg, is moving on a circular track with a radius of 8 m. If the train's rate of revolution changes from 1/6 Hz to 1/2 Hz, by how much will the centripetal force applied by the tracks change by?
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Will computer programming ever be a subject?
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What is the difference between momentum(m×v) and kinetic energy (1/2mv^2)of an object?
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