Sphere rolling up a ramp.. No mass given!! 1. The problem statement, all variables and given/known data A solid sphere of radius 20cm, has a velocity of 5.0m/s and is moving on a surface with just enough friction to allow it to spin. It rolls up an incline of 30 degrees. Calculate the distance rolled before it comes to rest on the incline. 2. Relevant equations PE + KE = PE mgh + .5mv^2 = mgh 3. The attempt at a solution I cancel out m, and plug in: (9.81)(0) + (1/2)(5.0)^2 = (9.81)(h). h is 1.27, so I use trig to find the length of ramp, which is 2.54 m. However, I feel like I'm missing something crucial in this answer, and none of the choices match.