• http://www.engineeringinteract.org/resources/parkworldplot/flash/concepts/allaboutforces.htm
http://science.nayland.school.nz/SimonPa/Resources/year 10/term 3/Forces and Motion 2008/year 10 Forces.ppt (you can skip through the math if your students are younger)
• http://www.elko.k12.nv.us/ecsdtc/ppp/force.ppt
• http://www.greenville.k12.sc.us/eastside/simmons/docs/ps/ch3.ppt
• http://www.ngfl-cymru.org.uk/vtc/identify_forces/eng/Introduction/default.htm
http://www.bbc.co.uk/schools/scienceclips/ages/6_7/forces_movement.shtml
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