Calculating the Magnitude of Torque to Stop a Spinning Rod

[yomama]

A 2.0 kg, 1.0 m long rigistic plastic rod is spinning about its center of mas at 2.1 rad/s. What is the magnitude of torque that will bring the rod to a halt in 5.0 s?

A.) 0.07 N*m
B.) 0.13 N*m
C.) 0.21 N*m

If you could help me set up the proper equation to use, I would greatly appreciate this.

 

[rl.bhat]

If ωi is initial angular velocity. ωf is the final angular velocity and α is the angular acceleration then
ωf = ωi + α*t.
From the given values find α.
Torque = Ια.

 

[yomama]

Thanks Brotha!