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Which statement about induced drag is correct?

Choices

  • ✓ It is a by-product of lift and is greatest at low airspeedcorrect

    Induced drag results from producing lift and dominates at low speed and high angle of attack.

  • It increases with the square of airspeed

    That describes parasite drag, not induced drag.

  • It is caused only by skin friction

    Skin friction is a component of parasite drag, not induced drag.

  • It is greatest at high airspeed

    Induced drag decreases as airspeed increases.

Why

Induced drag is a by-product of lift, so it is greatest at low airspeed and high angle of attack and decreases as airspeed increases.

FAA source: PHAK Ch. 5browse the reference library →

This is taught in The Four Forces, Lift and Drag — study the lessons free, then practice with grading and mastery tracking.

Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.

Which statement about induced drag is correct? · PPL Free Ground School