ii/ a. b. C. The four bar chain mechanism shown below has dimensions; AB = 100mm; = BC 200mm; CD = 300mm; DA = 400mm. The horizontal link DA is fixed and AB rotates in a clock-wise direction at a constant 210 rev/min. Produce a velocity diagram when the angle DAB = 30 and use the velocity diagram to determine: the angular velocity of the link BC the linear velocity of the mid-point on link BC the angular velocity of the link CD C Four bar chain B 30 A D