Hollow sphere rolling momentum

[jjd101]

Homework Statement

An 800 g, 40.0 cm diameter hollow sphere is rolling along at 4 m/s when it comes to a 25 degree incline. Ignoring any friction, how far along the incline does it roll before it stops and reverses its direction?

Homework Equations

Krolling= 1/2Iw^2 + 1/2Mv^2
I=2/3MR^2

The Attempt at a Solution

Too difficult to type

 

[Delphi51]

It looks like an energy question to me!