Theory of Machine
The height of a Watt's governor is

Inversely proportional to speed
Directly proportional to speed
Directly proportional to (speed)²
Inversely proportional to (speed)²

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Theory of Machine
The contact ratio is given by

(Length of the arc of contact)/(Circular pitch)
(Length of the path of approach)/(Circular pitch)
(Length of path of recess)/(Circular pitch)
(Length of the arc of approach)/cosφ

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