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Grades 6–12. Students Build The Following Pulley Systems:1 Fixed 2 Fixed, 1 Movable 3 Fixed, 2 Movable To Further Challenge Students, Teachers Are Provided Instructions To Build A More Complex Pulley System Using 4 Different Lengths Of Rope, 4 Movable Pulleys, And 1 Fixed Pulley. In This System, Only 2 Rope Segments Support The Load. Counting Ropes To Determine The Mechanical Advantage Does Not Work. Challenge Students To Explain Why And Calculate The Mechanical Advantage. Extend This Lesson By:Combining Student Groups To Create A New Pulley System And Determine Its Mechanical Advantage Investigating How Pulleys Can Be Used To Multiply Distance Presenting Information On How Pulleys Are Used In Various Careers Creating A Picture Collage Of Pulleys In Action To Incorporate An Artistic Element (Steam) Students Build 3 Different Pulley Systems Using Fixed And Movable Pulleys. For Each System, They Measure The Force Needed To Lift A Load, Calculate The Mechanical Advantage, And Calculate The Percentage Of Efficiency. Materials Support 10 Groups Of 3 Students. A Ring Stand, Ring, Hanging Mass Set, Spring Scale, And Meter Stick For Each Group Are Needed But Not Supplied. Includes Teacher'S Manual With Reproducible Student Guide. Simple Machines: Pulleys : Sample Teachers Manual
