Theory of Machine
The direction of Coriolis component of acceleration is the direction

Along perpendicular to angular velocity
Along the centripetal acceleration
Along tangential acceleration
Of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link

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Theory of Machine
Pitch point on a cam is

Any point on pitch circle
The point on cam pitch curve having the minimum pressure angle
Any point on pitch curve
The point on cam pitch curve having the maximum pressure angle

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