Conservation of Energy, Ball going down slope

[datrumpet45]

Homework Statement

A solid 162 N ball with a radius of 0.350m rolls 5.9 m down a ramp tha is linclined at 33° with the horizontal. If the ball starts from rest at the top of the ramp what is the angular speed of the ball at the bottom of the ramp?

Homework Equations

ME_i= ME_f
PE_g=KE + KE_rot
mgh= .5mv² +.5Iω²
ω= v/r

The Attempt at a Solution

I solved the conservation of energy equation for velocity then divided by the radius of the ball, but it did not work, am I approaching the problem wrong?

 

[ehild]

Show your work in detail, please.

ehild