Question

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

Answer 1

CALCULATE THE SPEED OF THE TIP SECOND'S HAND OF A WATCH OF LENGTH 1.5 cm. The second hand traces its path around the clock once in 1 min. The distance travelled by the tip of the hand in this time is 2 x pi x 1.5cm. Thespeed is then 3pi cm/min, which is 1.57 x 10-3 ms-1.

Answer 2

Given :

Length =  1.5 / 100 

length = 0.015 m 

Speed = 2π$\frac{r}{60}$

Speed = 2 x 3.14 x 0.015 / 60

 speed = 0.00157 m/s 

May it helps you