Given: mechanism consists of 3 members: (1) block 1 of mass m1=7kg; (2) nonhomogeneous disk 2 of mass m2=19kg, bigger radius R2=46cm, smaller radius r2=6cm, radius of inertia ρ2=17cm; (3) block 3 of mass m3=47kg.
Mechanism is moving in vertical plane from the state of rest under the action of gravity forces.
Find: algebraic angular acceleration of disk 2 (in rad/s2), considering it positive if directed counterclockwise and negative if clockwise ε2=?