1. The problem statement, all variables and given/known data Three uniform objects: a ring, a disk, and a sphere all have identical masses and radii. They are released simultaneously from the top of a ramp 3.80 meters in LENGTH. If the ramp is inclined at θ= 17.0°, use conservation of energy to calculate the linear speed of the ring, disk and sphere. 2. Relevant equations Ei=Ef Iring = mr2 Idisk = (mr2)/2 Isphere = (2mr2)/5 3. The attempt at a solution Ui + Ki = Uf + Kf mgh = (1/2)Iω2f + (1/)mv2f <--initial K and final U are zero then substituting I for Iring mgh = (1/2)((mr2)(vf)/(r)) + (mv2f) masses cancel, pulled out 1/2 gh = (1/2)(rvf + v2f) But that's as far as I can get before I can't understand it.