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Question:

The law of conservation of energy can be restated as which of the following?

A Energy cannot be created or destroyed, only changed.
Explaination

The law of conservation of energy states that the total energy of an isolated system remains constant. Energy cannot be created or destroyed, but it can change from one form to another. For example, an object dropped from a rooftop will undergo a change from potential energy to kinetic energy and hit the floor with a force equal to the amount of work done on the object by gravity.