Asked by ABAINEH
which of the following is not true about a uniform circular motion? A. The direction of the velocity continuously changes B. The magnitude of the velocity continuously changes C. The direction of the acceleration continuously changes D. the magnitude of the acceleration remain constant
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Answer: B.
In uniform circular motion the speed (magnitude of velocity) is constant, so its magnitude does not continuously change. The velocity's direction does change continuously, and the acceleration is always centripetal (direction continuously changing toward the centre) with constant magnitude a = v^2/r.
In uniform circular motion the speed (magnitude of velocity) is constant, so its magnitude does not continuously change. The velocity's direction does change continuously, and the acceleration is always centripetal (direction continuously changing toward the centre) with constant magnitude a = v^2/r.
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