Given: mechanism consists of 3 members: (1) homogeneous disk 1 of mass m1=8kg and radius R1=33cm; (2) homogeneous disk 2 of mass m2=15kg and radius R2=55cm; (3) homogeneous disk 3 of mass m3=8kg and radius R3=29cm.
Mechanism is moving in vertical plane from the state of rest under the action of force couple with moment M=3,7N·m.
Find: angular acceleration of disk 1 (in rad/s2). ε1=?