The input link O2P of a four bar linkage is rotated at 2

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The input link O₂P of a four bar linkage is rotated at 2 rad/s in counter clockwise direction as shown below. The angular velocity of the coupler PQ in rad/s, at an instant when ∠O₄O₂P = 180°, is

PQ = Q₄Q = √2a
O₂P = O₂O₄ = a

1. 4
2. 2√2
3. 1
4. 1√2

Correct Option: C

When ∠O₄O₂ P = 180°

Now,	ω₃	=	I₁₂I₂₃	=	a
	ω₂		I₁₂I₂₃		2a

	ω₃	=	1
	2		2

ω₃ = 1 rad/s