The length of a second hand of a clock is 10 cm. find the speed of the tip of

the hand?Seconds's hand completes one rotation in 60 seconds.

Its angular velocity is 2*pi radian / 60 seconds

We know that v = radius x angular velocity

v = 10 cm x 2*pi / 60 seconds = pi/3 cm/second = 1.05 cm/s