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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define drag force in your own words.
💡 Hint: Think about what happens when you stick your hand out of a moving car window.
Question 2
Easy
What does the coefficient of drag (Cd) describe?
💡 Hint: This coefficient varies from one shape to another.
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 coefficient of drag (Cd) depend on?
- Shape of the body
- Fluid density
- Both A and B
💡 Hint: Consider how different objects experience varying resistance.
Question 2
True or False: Lift force always acts in the same direction as the flow.
- True
- False
💡 Hint: Remember how airplane wings generate lift.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A car with a frontal area of 3 m² and a drag coefficient of 0.3 is traveling at 30 m/s. Calculate the drag force acting on the car.
💡 Hint: Make sure to convert your units appropriately.
Question 2
If a cyclist can reduce their Cd from 0.9 to 0.6 by changing positions, quantify the potential speed increase if power output remains constant.
💡 Hint: Consider the relationship between power, velocity, and drag.
Challenge and get performance evaluation