Energy can be transferred and transformed but never created or destroyed from "summary" of The World of Physics 2nd Edition by John Avison
The fundamental principle of energy conservation states that energy cannot be created or destroyed, only transferred or transformed. This means that the total amount of energy in a closed system remains constant over time. Energy can change from one form to another, such as potential energy to kinetic energy, but the total amount of energy in the system remains the same. For example, when a ball is thrown into the air, it possesses kinetic energy due to its motion and potential energy due to its height. As the ball rises, its kinetic energy decreases while its potential energy increases. At the highest point of its trajectory, all of its initial kinetic energy has been converted into potential energy. As the ball falls back to the ground, its potent...
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