Practice question
Question
An object moves in a circular path of radius 4m with a frequency of 5Hz. What is the magnitude of its centripetal acceleration?
Explanation
Angular speed ω=2πf=2π×5=10πrad/s. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 3947.8 m/s² as the result, so option A is correct.
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