đ Key Concepts
⢠KM, KG, GM relationship in ship stability (how they add up on a vertical line diagram)
⢠Definition of GM (metacentric height) and how it is measured between two points
⢠Remember that KM is measured from the keel, and GM is measured from the center of gravity
đ Think About
⢠Draw the vertical line from keel up through K, G, M and label KM, KG, and GMâhow are these distances related by addition or subtraction?
⢠If KM is the distance from the keel to the metacenter, and GM is from the center of gravity to the metacenter, what distance is left between the keel and the center of gravity?
⢠Think of a simple equation: KM = KG + GM. If that is true, what do you get when you rearrange the formula to solve for KG?
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Before You Answer
⢠Be clear on what point each letter refers to: K (keel), G (center of gravity), M (metacenter)
⢠Verify which distances are measured from the keel and which are between G and M
⢠Check that the unit is a vertical distance and that your result is a known stability term from the answer choices