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Text File  |  1992-09-02  |  550b  |  14 lines
  1. The resistance to motion a body experiences
  2. when passing through a fluid - gas or liquid.
  3. The aerodynamic drag aircraft experience when
  4. travelling through the air represents a great
  5. waste of power, so they must be carefully
  6. shaped, or streamlined, to reduce drag to a
  7. minimum. Cars benefit from streamlining, and
  8. aerodynamic drag is used to slow down
  9. spacecraft returning from space. Boats
  10. travelling through water experience
  11. hydrodynamic drag on their hulls, and the
  12. fastest vessels are hydrofoils, whose hulls
  13. lift out of the water while cruising.
  14.