1. Watch this video clip.
What forces do the athletes have to overcome to win?
How can they reduce these forces?

2. Fluid Friction
Friction exists between solids and fluids (liquids or gases). The particles of the fluid provide resistance thus creating friction.
For example, a plane travelling through the air has to overcome the friction of the air particles it is passing through.

3. A skin-tight super swimsuit, designed with the aid of Formula 1 technology and a Hollywood special effects team, was unwrapped yesterday. At a worldwide launch, Katy Sexton and Mark Foster (UK) wriggled into the suits, to demonstrate the drag-defying, shark-like properties of the £250 suits.
Source: The Guardian, March 9th 2004

4. Would an Olympic swimmer
prefer to wear..... OR
WHY?
THIS?
THIS

5. Use the Thinking Frame to answer the question: How come the new shark swimming suit is preferred?