The wheel of an automobile is rotating with ` 4` rotations per second. Find its angular velcoity . If the radius of the fly wheel, is ` 50 cm`, find the linear velcotiy of a point on its cicrumfernce.

Explanation

` omega= 2 pi v = 2 pi xx 4 = 8 pi ` rad. ` s^(-1)` ,
` v=r omega = 50 xx 8 pi cm s^(-1) = 400 pi cm s^(-1)`.