13.3.1. Drag Force Analysis

Try these first

1. 1.

   Define drag force in your own words.

   Hint

   Think about the interaction of an object with air or water.

2. 2.

   What does dimensional homogeneity mean?

   Hint

   Consider how you would check if an equation makes sense.

3. 3.

   What is drag force?

   • The force moving an object forward
   • The force opposing the motion of an object in a fluid
   • The force acting on a stationary object
   • None of the above

   Hint

   Consider the forces acting against objects in motion.

4. 4.

   Is dimensional homogeneity important in engineering equations?

   • True
   • False

   Hint

   Review the concepts of validity in equations.

5. 5.

   Calculate the drag force acting on a 5m tall cylindrical object in a wind tunnel, given the wind velocity of 10 m/s. Use drag coefficients learned.

   Hint

   Ensure you use the correct drag coefficient for the shape.

6. 6.

   Discuss what factors would affect drag force on an object moving through different mediums (air vs. water).

   Hint

   Think about how each property varies between mediums.