1. Mar 16, 2010 #1

   mussayab

   

   Why do we choose to use the work energy principle instead of the Newtons law to analyze the motion of a system of rigid bodies?

    

   mussayab, Mar 16, 2010
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3. Mar 16, 2010 #2

   minger

   

   Science Advisor

   Both principles work in every case. That is, there is always conservation of momentum and energy. Sometimes, it makes more sense (read, easier) to solve a particular problem in a certain way.

    

   minger, Mar 16, 2010

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