I came across a very good lecture online – given in MIT concerning work, energy, etc. The end of the video shows a very good illustration of conservation of energy!
The video is available as a Real player file to download from http://ocw.mit.edu/OcwWeb/Physics/8-01Physics-IFall1999/VideoLectures/detail/Video-Segment-Index-for-L-11.htm.
“Physics works and I’m still alive, see you Wednesday.”
