Weather servicesQuestion 393 of 934

How does ice change the forces on an airplane?

  1. Thrust rises, drag falls, lift rises, and weight falls
  2. Weight and drag rise, but thrust and lift stay the same
  3. Thrust falls, drag rises, lift falls, and weight rises
  4. Thrust and lift rise, while drag and weight fall
Show answer

Correct answer: Thrust falls, drag rises, lift falls, and weight rises

The result is a higher stall speed and poorer performance.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 7-1-19 PIREPs Relating to Airframe Icing, page 562

Practice weather services

Questions last reviewed: 18 October 2026