20.7. Conclusion and Summary

Try these first

1. 1.

   Define conservation of momentum.

   Hint

   Think about how a ball keeps rolling unless acted on by a force.

2. 2.

   What is a control volume?

   Hint

   It's like a box you imagine around a section of fluid.

3. 3.

   What does the conservation of momentum principle state?

   • Momentum can be created
   • Total momentum remains constant
   • Momentum is destroyed

   Hint

   Think about rolling objects.

4. 4.

   True or False: Body forces are always attributed to external influences on a fluid.

   • True
   • False

   Hint

   Consider whether they exist without an external cause.

5. 5.

   You have a tank filled with water that drains from a spout. Calculate the changes in momentum as water exits the spout.

   Hint

   Consider how fast the water is flowing out.

6. 6.

   Design a control volume for airflow around a plane wing and predict pressure distributions using momentum conservation equations.

   Hint

   Focus on how the wing shape affects airflow patterns.