Machine Design
In radial cams, the follower moves

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

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Machine Design
In a hydrodynamic lubricated bearing

There is no lubricant between the journal and the bearing
The lubricant is forced between the journal and the bearing, by external pressure
There is a thick film of lubricant between the journal and the bearing
There is a thin film of lubricant between the journal and the bearing

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