Question

the length of the second hand of a clock is 21 cm what will be the magnitude of linear velocity of its extreme.

Answer 1

We know that in a circular motion, the speed of the object is radius times angular velocity.

v = wr

We have, w = \frac{2π}{T}

where T is the time for one complete rotation.

Therefore,v = 2πr/T

= 2π*21cm/60s

v = 2.2 cm/s (answer)

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