11.3.1. Forces in a Fluid at Rest

Try these first

1. 1.

   What is pressure in a fluid determined by?

   Hint

   Think about how weight affects pressure.

2. 2.

   Define buoyant force.

   Hint

   It relates to Archimedes principle.

3. 3.

   What is the formula for pressure in fluid?

   • P = ρgh
   • P = ρg
   • P = h/ρ

   Hint

   Think about the relationship between pressure, fluid density and depth.

4. 4.

   True or False: The buoyant force is always equal to the weight of the object.

   • True
   • False

   Hint

   Consider why something can float or sink.

5. 5.

   An object weighing 200 N is submerged in water. Calculate the volume of water it displaces.

   Hint

   Use the weight of the displaced fluid to find volume.

6. 6.

   A ship has a center of gravity located 2m below its metacenter. Discuss the stability advantages this may provide.

   Hint

   Consider how balance functions with height differences.