Calculate the speed of the tip of second's hand of a watch of length `1.5 cm`.

Options

A. 0.32 cm `s^(-1)`
B. 1 cm `s^(-1)`
C. 0.16 cm `s^(-1)`
D. 0.5 cm `s^(-1)`

Answer

C

Explanation

Here, radius r = 1.5 cm, Time taken by second.s hand of a watch to go once around the circle, t = 60 s
from `v=(s)/(t)=(2pi r)/(t)=2xx22/7xx1.5/60=0.16 cm s^(-1)`