1. The problem statement, all variables and given/known data: Cylinder of mass m, radius r is rolling without slipping with angular velocity ω and Vcm is ωr. Cylinder comes across a step of height R /4. The angular velocity just after the collision is..... Assuming cylinder remains in contact and no slipping occurs on the edge of the step. Relevant equations: Using cons. Of angular momentum. 3. The attempt at a solution: I conserved the angular momentum about the the edge of the stair The relevant equation is: 3/2 Mr^2(I about the edge)×ω-Mv3r/4 (angular monentum due to Vcm)= 3/2 Mr^2(after climbing up I remains the same)×ω2 (new angular velocity)- Mv2×r (new v hence v2) (NOTE:I hope you'll understand the significance of negative sign.) After solving I am not getting the required answer. Am I going wrong somewhere? Please feel free to correct any error. Thanks.