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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is drag force?
💡 Hint: Consider what happens as an object moves in water or air.
Question 2
Easy
How do you compute shear stress?
💡 Hint: Remember the relationship between force and area in a fluid.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the Reynolds number indicate?
- A measure of pressure
- A ratio of inertial to viscous forces
- A method of calculating drag
💡 Hint: Think about its role in fluid dynamics.
Question 2
True or False: Drag force is only affected by viscosity.
- True
- False
💡 Hint: Consider other factors involved.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
An automobile prototype has a drag coefficient of 0.35, a frontal area of 2.5 m², and tests show a velocity of 80 km/h in a wind tunnel. Calculate the drag force for the prototype in N.
💡 Hint: Remember to convert velocity properly before plugging values into the drag force formula.
Question 2
For dynamic similarity, a model scale is 1:10 with a velocity of 5 m/s. If you need to find the velocity of the full-scale object, what is it?
💡 Hint: Think about how scaling affects velocity and ratio calculations.
Challenge and get performance evaluation