Simple Machines from Mr. Johnson - a science teacher from Oklahoma http://www.sirinet.net/~jgjohnso/simple.html
Simple Machine Links http://www.teachers.ash.org.au/jmresources/simple/machines.html
More Simple Machines from Tooter4kids http://www.tooter4kids.com/Simple_Machines/
Explains the types of simple machines found in everyday objects http://staff.harrisonburg.k12.va.us/%7Emwampole/1-resources/simple-machines/index.html
Another list of simple machine links http://42explore.com/smplmac.htm
Simple Machines at Utah State University http://juniorengineering.usu.edu/workshops/machines/machines.php
Frankin Institute Site on Force and Motion http://fi.edu/msp/force/index.html
Forces in Action from the BBC http://www.bbc.co.uk/schools/scienceclips/ages/10_11/forces_action.shtml
Edheads Simple Machines http://www.edheads.org/activities/simple-machines/index.htm
California Academy of Sciences: What is a Pendulum Anyway? http://www.calacademy.org/products/pendulum/page1.htm
How Stuff Works: Pendulum Clock http://www.howstuffworks.com/clock.htm
Simple Pendulum Animation http://www.walter-fendt.de/ph11e/pendulum.htm
School For Champions: Pendulum http://www.school-for-champions.com/science/pendulum.htm
Pendulum Description and Animation from the Physics Classroom http://www.physicsclassroom.com/mmedia/energy/pe.cfm
Moving Man Simulation http://phet.colorado.edu/simulations/sims.php?sim=The_Moving_Man
How a Light Bulb Works http://home.howstuffworks.com/light-bulb.htm