A cyclist is moving on a circular track of radius \( 40 \mathrm{~m} \) completes half a revoluti... VIDEO
A cyclist is moving on a circular track of radius \( 40 \mathrm{~m} \) completes half a revolution in \( 40 \mathrm{~s} \). Its average velocity is
(a) zero
(b) \( 2 \mathrm{~ms}^{-1} \)
(c) \( 4 \pi \mathrm{ms}^{-1} \)
(d) \( 8 \pi \mathrm{ms}^{-1} \)
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