Angular acceleration of pulley with 12 N cable force

[Cheddar]

Homework Statement

A cable is around a pulley with:
radius = 0.1 m
moment of inertia = 0.15 kg * m(squared)

The cable receives a pull of:
force = 12 N

Find the magnitude of the resulting angular acceleration of the puller.

Homework Equations

Average angular acceleration = Change in angular velocity / Elapsed time
Average angular velocity = Angular displacement / Elapsed time

The Attempt at a Solution

I'm completely stuck since none of the given information can be used in the equations listed above.

 

[Doc Al]

Hint: Consider Newton's 2nd law for rotation.

 

[Cheddar]

Thanks, I think I have it. So:
angular acceleration = 12 * 0.10 / 0.15 = 8.0 rad/s(squared)
?

 

[Doc Al]

You got it.