3. Traction and Stress inside a fluid body at rest

Try these first

1. 1.

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

   Hint

   Think about what a fluid exerts when at rest.

2. 2.

   Why can fluids not sustain shear stress?

   Hint

   Consider the characteristics of fluid movement.

3. 3.

   What does the traction in a static fluid equal?

   • Zero
   • Pressure
   • Volume

   Hint

   Think about what keeps fluids stable.

4. 4.

   True or False: Fluids can sustain shear stresses when at rest.

   • True
   • False

   Hint

   Recall the properties of fluids.

5. 5.

   A spherical object is submerged in water at a depth of 5 meters. Calculate the pressure on the object. The density of water is 1000 kg/m³. Show your calculations in detail.

   Hint

   Use the equation for calculating hydrostatic pressure.

6. 6.

   Discuss how the simplification of the stress tensor in fluids impacts engineering design for underwater structures.

   Hint

   Think about how forces interact within different structures.