Work energy principle vs newtons law

  • Thread starter mussayab
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  • #1
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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?
 

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  • #2
minger
Science Advisor
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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.
 

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