Multiple choice

Drag is a frictional force exerted by _____.

  1. gases

  2. solids

  3. liquids

  4. both gases and liquids

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Drag is the frictional force exerted by fluids (both liquids AND gases) on objects moving through them. Air resistance (gas) and water resistance (liquid) are both forms of drag that oppose motion through the fluid.