Theory of Machine
The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ω(R - r₁) cosθ
ω(R - r₁) sinθ
ωr₁ sinθ
ωR cosθ

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Theory of Machine
Pitch point on a cam is

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

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