The mechanism consists of 4 members: wheels 1, 2, 3 and block 4.
Given: the wheel 1 rotates counterclockwise with angular velocity ω1=6rad/s. Radiuses of wheels are R1=38cm; R2=60cm; r2=37cm; R3=45cm; r3=21cm.
Find: the projection of the velocity of block 4 (in m/s) to vertical axis y directed upwards (considering the projection as positive if the velocity vector is directed upwards and negative if downwards) V4y = ?