Video: What is a pulley? https://www.youtube.com/watch?v=9T7tGosXM58&feature=youtu.be Video: What is a gear? https://www.youtube.com/watch?v=D_i3PJIYtuY Bill Nye Video: Simple Machines https://www.youtube.com/watch?v=VH9r1h3Cvp4&t=185s Fun game to play and learn about simple machines: Pulleys and Gears! http://www.hyperstaffs.info/work/physics/Muirhead/website/toys.swf https://www.brainpop.com/games/simplemachinesgame/ https://www.coolmathgames.com/0-gears-and-chains Creating a pulley that can lift your principal: https://www.youtube.com/watch?v=ebwdFQB-5Fg Fantastic website for books: Go to https://www.getepic.com/ - Create an account - Search for books on Pulleys and Gears
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