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

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

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Theory of Machine
Higher pairs are those which have

Point or line contact between the two elements when in motion
Elements of pairs not held together mechanically
Two elements that permit relative motion
Surface contact between the two elements when in motion

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