posted by George .
A solid sphere at rest at the top 12.0 m inclined plane rolls down the incline. How high vertically does it rise of the other incline?
The question is worded incorrectly.
So to further explain: there are two inclines, the bottom ends of both inclines are touching, so that as the ball rolls to the bottom of the first incline, it immediately begins to rise up the second incline. You are supposed to assume that the ball will rotate due to friction.