Rotational Motion

1. The problem statement, all variables and given/known data

Starting from rest, ahollow ball rolls down a ramp inclined at angle θ to the horizontal. Find an expression for its speed after it's gone a distance d along the incline.





2. Relevant equations



I for sphere = 2/5*M*R^2



3. The attempt at a solution

I know we have to use v^2=u^2+2ax

and we have to find the angular acceleration however I am not sure how to relate both of them.