Practice Drag Force Analysis (13.3.1) - Dimensional Homogeneity - Fluid Mechanics

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6 sample questions

Question 1.
Define drag force in your own words.
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Think about the interaction of an object with air or water.
Question 2.
What does dimensional homogeneity mean?
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Consider how you would check if an equation makes sense.
3Question 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
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Consider the forces acting against objects in motion.
4Question 4.
Is dimensional homogeneity important in engineering equations?
- True
- False
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Review the concepts of validity in equations.
Question 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.
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Ensure you use the correct drag coefficient for the shape.
Question 6.
Discuss what factors would affect drag force on an object moving through different mediums (air vs. water).
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Think about how each property varies between mediums.

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