Numerical Examples on Energy
The potential energy U = mgx of an 80-kg mass is shown versus height x near the surface of the earth.
Description
A variable horizontal force acts on a body while the displacement varies- this is one of the examples solved using energy considerations.Two projectiles with same initial speed but different launch angles are compared and their motion explained.Conservative forces, conservation of energy, potential energy due to conservative forces with a mention of gravitational force are explained in a simple way.
Prof. Stanley Kowalski, Physics 8.01 2003 Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed Aug 1st,2011). License: Creative Commons BY-NC-SA: http://ocw.mit.edu/terms/#cc
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