Which option best identifies the principle that explains buoyancy and why ships float?

Which option best identifies the principle that explains buoyancy and why ships float?

• A. Archimedes Principle
• B. Pascal's Principle
• C. Bernoulli's Principle
• D. Boyle's Law

Answer: (D)

Buoyancy is explained by Archimedes' principle: an object immersed in a fluid experiences an upward force equal to the weight of the fluid it displaces. A ship floats because its hull displaces a volume of water whose weight matches the ship’s total weight, creating a buoyant force that balances gravity. The hull is designed to maximize the displaced water for the ship’s weight, allowing large vessels to float even though they are heavy. The other principles describe different ideas: Pascal's principle deals with pressure transmission in a confined fluid, Bernoulli's principle links fluid speed to pressure in moving fluids, and Boyle's law relates gas pressure to volume. None of these alone explain why an object floats the way Archimedes' principle does.

Buoyancy is explained by Archimedes' principle: an object immersed in a fluid experiences an upward force equal to the weight of the fluid it displaces. A ship floats because its hull displaces a volume of water whose weight matches the ship’s total weight, creating a buoyant force that balances gravity. The hull is designed to maximize the displaced water for the ship’s weight, allowing large vessels to float even though they are heavy. The other principles describe different ideas: Pascal's principle deals with pressure transmission in a confined fluid, Bernoulli's principle links fluid speed to pressure in moving fluids, and Boyle's law relates gas pressure to volume. None of these alone explain why an object floats the way Archimedes' principle does.