Power - Ferris Wheel with friction

[MissPenguins]

Homework Statement

A motor keep a Ferris wheel (with moment of inertia 8.95X10^7 kg X m^2)rotating at 6.3 rev/hr. When the motor is turned off, the wheel slow down (because of friction) to 3.5 rev/hr in 25 s. What was the power of the motor that kept the wheel rotating at 6.3 rev/hr despite friction? Answer in units of W.

Homework Equations

P = $$\Delta$$W/$$\Delta$$t

The Attempt at a Solution

Well, if I interpret it correctly, I guess I have to convert 3.5 rev/hr to rad/s. Correct? And find W by FD? Sorry, I am too sure what to do. Thanks for your help.

 

[MissPenguins]

SORRY, someone else posted it already

 

[Bearbull24.5]

You wouldn't by chance be in Professor Woods' class?

 

[MissPenguins]

You wouldn't by chance be in Professor Woods' class?

I am in his class. I can tell you are since you have "Bull" in your username. ;)