wo identical uniform discs roll without slipping on two different surfaces AB and CD (see figure) starting at A and C with linear

Question

Two identical uniform discs roll without slipping on two different surfaces AB and CD (see figure) starting at A and C with linear speeds v₁ and v₂, respectively, and always remain in contact with this surfaces. If they reach B and D with the same linear speed and v₁ = 3 m/s, then v₂ in m/s is (g = 10 m/s²)

Answer 1

Final kinetic energy of both discs is same