Question

An insect trapped in a circular groove of radius 12cm moves along the groove steadily and completes 7 revolutions in 100s. what is the (a)angular speed and linear speed of the motion

Answer 1

Given that,

r = 12cm = 0.12m

1. Angular speed = 7 revolution in 100s  (since, 1 revolution = 2*3.14*r)

= 7*(2*3.14*0.12)/(100)

= 0.053 rad/s

 

Linear speed, v =  Angular speed *radius

=> v = 0.053*0.12 = 6.3*10^-3 m/s =0.63 cm/s