20.5. Principles of Linear Momentum Equations

Try these first

1. 1.

   Define linear momentum in your own words.

   Hint

   Think of how much 'motion' an object has.

2. 2.

   What is a control volume?

   Hint

   Consider a box around a flowing fluid.

3. 3.

   What does the Reynolds Transport Theorem relate?

   • Changes in the volume only
   • Calculation of momentum within a control volume
   • Friction in fluids

   Hint

   Think of it as connecting motion inside a box.

4. 4.

   True or False: Surface forces include gravitational forces acting on fluid.

   • True
   • False

   Hint

   Remember how gravity influences all particles equally.

5. 5.

   A cylindrical vessel has water flowing in and out unevenly through different ports. Describe how you would calculate the net momentum change with provided velocities and corrections.

   Hint

   Draw a visual for clearer flow relationships.

6. 6.

   If a bridge pier is subjected to different flow speeds around it due to an approaching current, how would you compute the forces acting on it using momentum principles?

   Hint

   Use diagrams to visualize pressure effects and flow paths.