🔍 Key Concepts

• Vertical center of gravity (VCG) is a weighted average of all individual weights and their vertical distances above a reference point (usually the keel) • The sum of vertical moments equals the total "moment" of all weights about the reference point • To get an average position from total moments and total weight, think about how you calculate a center of mass or center of gravity in basic physics

💭 Think About

• If you know the total vertical moment and the total displacement (total weight), what mathematical operation gives you an "average height" of all the weights? • Compare each choice to how you usually compute a center of gravity: is it moments times weight, moments plus weight, moments minus weight, or moments divided by weight? • Think about dimensions (units): vertical moment is (tons × meters or long tons × feet). Displacement is (tons). What operation between these two gives a result in just meters or feet?

✅ Before You Answer

• Confirm that VCG must have units of length (feet or meters), not moment units • Confirm that displacement is a total weight, not a distance or a moment • Check which operation between total vertical moment and displacement produces units of length (meters/feet), matching a vertical position