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In which of the following mechanism the relative motions of the rigid bodies are in one plane or in parallel planes?

In which of the following mechanism the relative motions of the rigid bodies are in one plane or in parallel planes? Correct Answer planar mechanism

In a planar mechanism, all particles describe plane curves in space and all the curves lie in a single or parallel planes. The relative motions are constrained to a single plane. Hence, the planar mechanism is a 2 – D mechanism.

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