Total mechanical energy of a system

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Homework Help Overview

The discussion revolves around the concept of total mechanical energy in a system, specifically focusing on the relationship between kinetic energy and potential energy. Participants are exploring whether total mechanical energy is equally divided between these two forms of energy.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the assumption that kinetic and potential energy are always equally divided, with some suggesting that the ratio can vary. Others are discussing the implications of energy transformations between kinetic and potential forms.

Discussion Status

The discussion is active, with participants expressing differing views on the relationship between kinetic and potential energy. Some have provided clarifications regarding the definitions and nature of energy in a system, while others are challenging the notion of equal division.

Contextual Notes

There is an emphasis on the complexity of energy forms in real-life scenarios, which may not align with simplified models often used in homework problems. Participants are also considering the implications of energy conservation and transformation.

erinbrattin
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is it true that the total mechanical energy of a system is equally divided between kinetic energy and potential energy?
 
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That is the definition, yes, but you should definitely realize that there are many more forms of energy in real life, but they just get messy and complicated if you try to introduce them into simple problems.
 
I don't see how that could be. The reason we keep track of potential energy is because it can change into kinetic energy, and vice versa. The ratio of kinetic to potential energy is constantly changing.
 
erinbrattin said:
is it true that the total mechanical energy of a system is equally divided between kinetic energy and potential energy?
EQUALLY being the key word here...The answer is no. Think about it. An object can have potential but no kinetic energy and vice versa. You my possibly be meaning that KE and PE are combined to make the entire energy in the system...but it is not split evenly between the two.
 
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