Inclined Planes, check out some links below!
http://www.physicsclassroom.com/Class/vectors/u3l3e.cfm
http://atlantis.coe.uh.edu/archive/science/science_lessons/scienceles1/plane.htm
http://scienceforkids.kidipede.com/physics/machines/inclinedplane.htm
The one below is my favorite! Check it out.
http://www.brainpop.com/technology/simplemachines/inclinedplane/preview.weml
http://atlantis.coe.uh.edu/archive/science/science_lessons/scienceles1/plane.htm
http://scienceforkids.kidipede.com/physics/machines/inclinedplane.htm
The one below is my favorite! Check it out.
http://www.brainpop.com/technology/simplemachines/inclinedplane/preview.weml