Theory of Machine
In a radial cam, the follower moves

In any direction irrespective of the cam axis
In a direction parallel to the cam axis
In a direction perpendicular to the cam axis
Along the cam axis

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Theory of Machine
In a single slider crank chain

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

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