Momentum and Impulse for a flywheel

[richiecky]

Hey. Just wondering if I could get a little help with this quest please.

A flywheel has a moment of inertia of 854kgm^s, and is allowed to come to rest from and angular velocity of 450rpm. Knowing that kinetic friction produces a resisting moment of magnitude 14Nm, determine the time required for the flywheel to come to rest.

well, i know that 450x(2pi/60) = 47.12 rad/min = 0.785rad/sec
so 0.785 is the intial angular velocity..

but am not sure where to go from here.
Could someone point me in the right direction please?
Thanks

 

[rl.bhat]

Moment of inertia of the flywheel and torque on it is given. From thewse values find the angular retardation alpha, which is equal = torque/I. Then using kinematics find the time.