Theory of Machine
The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.

Vertically and parallel
Vertically and perpendicular
Horizontally and parallel
Horizontally and perpendicular

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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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