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Find the speed of the tip of a 3 cm long...

Find the speed of the tip of a 3 cm long second's hand in a clock.

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The tip of the second.s hand describes an angle of `360^(@)` in 60 seconds when it completes the total circular path once.
Hence, distance travelled = circumference of the circle `= 2pi xx 3 = 6pi` cm , time = 60 s.
`:.`Speed = `(6pi)/(60) = (pi)/(10) = 0.314 "cm" . s^(-1)`.
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CHHAYA PUBLICATION-ONE - DIMENSIONAL MOTION -CBSE SCANNER
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