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12.10 Energy


Element to set the principle of the energy and work for two objects or systems. In case of problems involving an element Center, it is assumed that events occur in a horizontal plane, so the gravitational potential energy is not taken into account. Nor does it take into account for the case of the explosion of a projectile. Since it is considered the state an instant before the explosion and the state an instant after it.

System i:A System or Object that represent the initial state.
System f:A System or Object that represent the final state.
W:The work involved in changing state.