Theory of Machine
In a four bar chain or quadric cycle chain

Three are turning pairs and one is a sliding pair
One is a turning pair and three are sliding pairs
Two are turning pairs and two are sliding pairs
Each of the four pairs is a turning pair

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Theory of Machine
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The total acceleration of B with respect to A will be equal to

Vector difference of radial component and tangential component
Vector sum of tangential component and Coriolis component
Vector sum of radial component and tangential component
Vector sum of radial component and Coriolis component

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