• In order to answer the essential question, answer at least 6 focus questions.
• Write up a Contract and choose what type of presentation you will make.

Essential Question:  How do sailboats work?

Focus Questions:
*How is a sail like a wing?
*What is the Bernouli Principle and how does it influence a sail?
*Use the Wind Speed Scale and show examples of 4 different wind forces..
*How do you steer a sailboat? (Draw a picture showing the forces on the rudder and on the boat.)
*How do center of effort, center of resistance effect a sailboat? What does a center board (or keel) do?
*How do center of gravity, and center of buoyancy effect a sailboat?
*How does a sail's shape influence how well a boat moves?
*Show a picture of a sloop rigged sailboat.  Label the jib and mainsail.  Show how the wind makes the boat move.
*Describe the points of sail and define windward, leeward, up, down, weather, lee.
*What are 6 different types of sail rigs (show pictures and tell advantages and disadvantages)?

References:
Working The Wind (from On The Wind by David Seidman )
How Sails Boats Work
How Sails Work
Lessons on Sailing
The Physics of Sailing
Center of Effort
More Center of Effort