On the fully containerized ship, approximately one-third or more of the cargo is on deck above the rolling center. Top stowed containers are subject to __________.
• rolling center and vertical distance from it • how motion changes for cargo stowed higher vs. lower on the ship • difference between container ships and conventional breakbulk vessels in cargo location
• How does the distance from the rolling center affect the motion (and therefore acceleration) experienced by an object when the ship rolls? • Compare a container stowed low in the hold and one stowed high on deck: which one travels through a larger arc when the vessel rolls the same angle? • If the ship’s rolling angle is the same, what happens to linear acceleration as the radius (distance from the rolling center) increases?
• Be clear on what rolling center means in terms of ship motion. • Visualize or sketch the arc of movement of a container on deck vs. one deep in the hold. • Eliminate any options that contradict basic physics: motion at a greater radius from the center of rotation.
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