17.5.1 - Definition of Friction and Pressure Drag
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Practice Questions
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Define friction drag.
💡 Hint: Think about what happens at the surface of an object moving through water.
What is the drag coefficient?
💡 Hint: Consider the factors that affect how drag is calculated.
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Interactive Quizzes
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What causes friction drag?
💡 Hint: Consider what happens at the surface level.
True or False: Pressure drag only occurs in turbulent flow.
💡 Hint: Think about the scenarios in which pressure drag can be observed.
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Challenge Problems
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A car with a frontal area of 2.4 m² and a drag coefficient of 0.32 moves at 30 m/s. Calculate the drag force it experiences in the air where the density is 1.225 kg/m³.
💡 Hint: Ensure you substitute all values correctly in the drag force equation.
A swimmer with a body area of 0.7 m² experiences a drag force of 5 N while moving at 1.5 m/s in water with a density of 998 kg/m³. Find the swimmer's drag coefficient.
💡 Hint: Use the provided values to calculate the drag coefficient.
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