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Lecture: 18   (iq15)

1. Overview:  The energy principle: DE=W+Q. For now only consider the case Q=0.

2. Motion in 1d.

3. Motion in 2d. W=FxDx+ FyDy =Fs cosq

4. Energy update

o   Throw a ball

o   Electron accelerator.

 

Announcements:

o   Course summary of unit 2 (draft, 10/5/10) has been posted. Please call my attention on errors errors. Your comments are welcome.