Table of Contents Simple Machines PROCEDURE


Part I: Simple Machines on Your Boat Outdoor Classroom - 10 minutes


1. Pre-reading: Assign Chapters 2-4 in Learn Sailing Right! Beginner before today’s class (not imperative).


2. Assess Prior Knowledge - Ask students “What do you know about simple machines? Can you name any? Can you think of any simple machines that relate to sailing?” Before teaching students how to rig a sailboat, take the students out to the boatyard. Have students gather around an unrigged sailboat. Tell students that sailboats can have very simple or very complex rigging, but they all use the same concepts. You have already learned how sailboats are powered by wind, now we are going to learn how to harness the wind by maximizing the mechanical advantage available to us.


3. Ask students to name a few parts of the boat. (Bow, Stern, Port, Starboard) Remind students that sometimes sailors use a nomenclature or sailing terminology.


4. Ask students, “What is this?” (point to a pulley), “Does anyone know what sailors call these?” (Blocks), “Do you see any other pulleys on the boat? Where?”. Ask students, “Why do sailboats have so many pulleys? What job does a pulley do?”.


5. Tell students today we are going to learn how sailors decrease their work by using simple machines.


6. Ask students to identify areas of the sailboat where hard work is being done (raising sails, trimming sails, steering). Ask students how simple machines are used to reduce the amount of work.


7. This is a great time to teach students how to rig a boat using simple machines to reduce the amount of work. Show students the pulley in the top of the mast that helps raise the main sail. Explain each pulley as you rig.


Part II: Simple Machine Scavenger Hunt Outdoors or Indoors - 30 minutes


1. Review the six simple machines this can be done by a teacher in class prior to the day at the sailing center.


Pulley: Screw:


Flag pole


Wheel and Axel: Car or dolly Wedge:


Inclined Plane: Ladder, ramp Lever:


56


Jar lid (screws on the boat) Door stoppers or ramp Stapler


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