Angular velocity and accelerating problem

[reaperkid]

Homework Statement

A disk accelerates with a constant angular acceleration of 2.0 rad/s2. If the initial angular velocity is 5.0 rad/s, what is the angular velocity of the disk after rotating though an angle of 11.0 radians?

a = 2 rad/s^2
vo = 5 rad/s
Theta = 11 rad

Homework Equations

a = v^2/r
v = change in theta/change in time

The Attempt at a Solution

I'm very confused on these angular problems. Everyone always tells me that they're just like the linear ones but I disagree. There's something big that I'm missing.

I tried a couple things since I couldn't find a good formula to use.

I tried.. 5 + 1/2(2)(11^2) which is wayy too high I'm thinking.

Then I tried 5 + 2*11 = 27 rad/s.. which is also wrong.

Clearly I'm very confused, can anyone help me on the right track?

Thanks!

 

[LowlyPion]

Keep in mind that the rotational equations are basically the analog of the linear kinematic equations.

http://hyperphysics.phy-astr.gsu.edu/hbase/rotq.html#drot

 

[reaperkid]

Keep in mind that the rotational equations are basically the analog of the linear kinematic equations.

http://hyperphysics.phy-astr.gsu.edu/hbase/rotq.html#drot

Thank you very much! I got it now, I guess I should have searched harder for a good equation.

My fault.