Kinetic Energy of Rolling Motion

[Cici2006]

Homework Statement

A 12g CD with a radius of 7.0 cm rotates with an angular speed of 35 rad/s.
What is its kinetic energy?

Homework Equations

The Attempt at a Solution

I used K=(1/2)mv^2(1+I/mr^2)
v=\omegar=(35rad/s)(0.07m)=2.45m/s
K=(1/2)(0.012kg)(2.45m/s)^2(1)=0.36

And it's wrong. Am i using the right formula? What should I do

 

[Doc Al]

For rotational KE, use:
{KE} = 1/2 I \omega^2

 

[Cici2006]

I used that too and i still got it wrong.

 

[Sourabh N]

Are you keeping track of units. If its not the problem, just show your calculation

 

[Cici2006]

Oh I know what i did wrong now i forgot to multiply by 1/2. THanks for the help