11.5.1. Equilibrium Concepts

Try these first

1. 1.

   What is buoyancy?

   Hint

   Think about what allows boats to float.

2. 2.

   What does Archimedes' principle state?

   Hint

   Consider the weight of water displaced by an object.

3. 3.

   What does Archimedes' principle describe?

   • Weight of fluid displaced
   • Weight of the object
   • Pressure in a fluid

   Hint

   Think about the relationship between an object and the fluid it displaces.

4. 4.

   True or False: A body will float if the buoyant force is equal to its weight.

   • True
   • False

   Hint

   Revisit the concept of buoyancy.

5. 5.

   Evaluate the stability of a ship with a center of gravity at 1.2m and a metacenter at 1.8m. If it tilts to 5 degrees, will it return to stability?

   Hint

   Check the relationship between GM and CG.

6. 6.

   A submerged object weighs 600N and displaces 500N of water. Will it float or sink? Explain.

   Hint

   Use the principle of buoyancy.