A truck with 28-in.-diameter wheels is traveling at 60 mi/h. Find the angular speed of the wheels in rad/min, *hint convert miles to inches

Angular speed = rad/min

Explanation:

Diameter of the wheel (D) = 28 inches

Radius of the wheel (R) = inches

Speed of wheels of a truck = 60 mi/h.

First convert 60 mi/h to inches per minute

1 mile = 63360 inches

1 hour = 60 minutes

So,

 inches per minute

Angular speed is given by

Here, R denotes the radius and denotes the speed.

Put

So,

Angular speed = rad/min