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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Smita Jems posted an Question
November 26, 2021 • 23:38 pm
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30 points
30 points
- IIT JAM
- Physics (PH)
When should we use conservation of mechanical energy and when should we use conservation of momentum
when should we use conservation of mechanical energy and when should we use conservation of momentum
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Anshum Sharma![best-answer]()
Conservation of energy can be applied without a problem between the two end states. In general, and answering the question, conservation of momentum is used whenever vectors must be used to describe a dynamic problem. Conservation of mass and conservation of energy apply to scalar quantities (in classical mechanics) and may not provide a full description when velocity must be used as a vector quantity. Note that the principle of virtual work can be applied in static situations also when vectors must be used, and provide the correct solution simply from a conservation of energy viewpoint.