An electric powered fan has a 9 inch diameter blade that rotates at 4000 revolutions per minute.
Find the angular speed of the sword in radians per minute.
Angular speed = ω = θ/t
Each revolution is 2π radians; The fan turns (4000 revolutions/min)(2π rad/revolution)
=8000π rad per minute
Angular speed = ω = θ/t=8000π/1 minute