2.1. Horizontal Surface Forces

Try these first

1. 1.

   What is the relationship between pressure and depth in a fluid?

   Hint

   Think about the weight of the fluid above.

2. 2.

   Define buoyancy in your own words.

   Hint

   Think about why boats float.

3. 3.

   What causes the pressure in a fluid to increase with depth?

   • Weight of the fluid
   • Temperature
   • Surface tension

   Hint

   Think about the concept of fluid weight above a point.

4. 4.

   True or False: The center of pressure is always located at the physical centroid of a submerged area.

   • True
   • False

   Hint

   Consider how pressure acts differently at various depths.

5. 5.

   A submerged cylindrical object has a diameter of 0.5 m and is 2 m long. Calculate the total downward force due to fluid pressure acting on the curved surface of the object when submerged to a depth of 5 m.

   Hint

   Use the formula A = πdh to find lateral area.

6. 6.

   Describe how changing the angle of inclination of a submerged surface affects the center of pressure and resultant force.

   Hint

   Visualize the surface tilted to see how pressure varies.