1.1. Traction contribution

Try these first

1. 1.

   Define traction in your own words.

   Hint

   Think about the role of forces at material boundaries.

2. 2.

   What is torque?

   Hint

   Consider how force affects rotation.

3. 3.

   What are traction forces?

   Hint

   Think about how forces act at the boundaries of materials.

4. 4.

   Is torque solely dependent on surface forces?

   • True
   • False

   Hint

   Recall the definitions of body forces and surface traction.

5. 5.

   A cuboidal object sits in a fluid. A uniform traction force acts on one face. Derive the torque about the centroid considering the boundaries.

   Hint

   Use the properties of cross products to analyze the forces.

6. 6.

   Evaluate how dynamic terms change the balance of angular momentum when a body accelerates with a time-varying force applied.

   Hint

   Remember how changes in acceleration affect forces in equilibrium.