Problem 1 on four bar chain for relative Velocity method / Velocity diagram

In a four bar chain ABCD, AD is fixed and is 150 mm long. The crank AB is 40 mm long and rotates at 120 rpm clockwise, while the link CD =80 mm oscillates about D. BC and AD are of equal length. Find the angular velocity of link CD when angle BAD=60°
#relativevelocitymethod
#velocitydiagram #velocity
#angularacceleration #angularvelocity
#theoryofmachines
#fourbarchain
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