Go to this website to help you fill in the worksheet.
http://scienceforkids.kidipede.com/physics/machines/pulley.htm
Learn about simple and compound machines while you explore the House and Tool Shed!
http://www.edheads.org/activities/simple-machines/index.shtml
This video shows us how pulleys are used at NASA with the Space Shuttle.
http://www.neok12.com/video/Simple-Machines/zX56004f445662567a447c45.htm
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