Physics
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Conservation of mechanical energy principle
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Conservation of mechanical energy principle
The principle of the conservation of mechanical energy states that the total mechanical energy of an isolated system remains constant in time, as long as the system is free of friction and other non-conservative forces. In other words a conservative force as a force which does not change the total mechanical energy, which is true, but might shed much light on what it means.
In any real situation, frictional forces and other non-conservative forces are present, but in many cases, their effects on the system are so small that the principle of conservation of mechanical energy can be used as a fair approximation. Though energy cannot be created or destroyed in an isolated system, it can be converted to another form of energy.
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