🔍 Key Concepts

• Center of gravity (G) and how removing weight high up affects it • Difference between free surface effect and changes in weight distribution • What happens to center of buoyancy (B) when you change shape of underwater volume vs just removing weight

💭 Think About

• When you throw weight overboard from a high deck, does the ship’s center of gravity move up or down? Why? • Does jettisoning weight from topside directly change the underwater shape of the hull at that instant, or just the mass distribution? • Which option talks about a dynamic liquid effect (tanks/fluids), and which talk about static weight position?

✅ Before You Answer

• Identify which choice refers specifically to liquid in tanks rather than solid weights • Ask yourself: which quantity changes when you change position of weight, and which changes when you change underwater volume shape? • Decide whether jettisoning topside weight, by itself, must always bring the vessel back to even keel, or if that depends on the original loading condition