1. The problem statement, all variables and given/known data We put a cyllinder with unknown mass and radius 0.1m which rotates with angular velocity 10 /s around its geometric axis on the horizontal ground. After what time does the cyllinder roll without slipping? Coefficient of friction is 0.1. 2. Relevant equations F=ma M=J ⋅ ∝ 3. The attempt at a solution J- moment of inertia, k-coefficient of friction ... a* - acceleration of center of mass The result should be 2.09 s. Please correct me!