1.3. Pressure is always perpendicular to the surface

Try these first

1. 1.

   What happens to fluid pressure as you go deeper underwater?

   Hint

   Think about why submarines have limits.

2. 2.

   What direction does pressure act in a fluid?

   Hint

   Remember the relationship between pressure and surfaces.

3. 3.

   Which statement correctly describes how pressure changes with depth in a fluid?

   • A: Pressure decreases with depth.
   • B: Pressure stays constant with depth.
   • C: Pressure increases with depth.

   Hint

   Consider the force applied by the fluid column above.

4. 4.

   True or False: Pressure in a fluid acts in the same direction as gravity.

   • True
   • False

   Hint

   Think about how pressure interacts with surfaces.

5. 5.

   A cylindrical tank has water filled to a depth of 15 meters. Calculate the pressure at the bottom and at a depth of 5 meters.

   Hint

   Use the specific weight of water for the calculations.

6. 6.

   Explain why the design of submarines must take into account the increase in pressure as they dive deeper.

   Hint

   Consider the implications of pressure on materials.