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No natural force can, for an indefinite period move it, so the ball as much as the brick has lost its potential energy. "All the motion and energy which was taken from the ascending ball by gravity is absolutely annihilated, no other motion or energy succeeds and gravity has received no increase of energy." Is it not true then that energy is indestructible! How then is it that your great authority teaches the world that "in no case is the force producing the motion annihilated or changed into anything else"? 

I am perfectly aware of your answer and give you these illustrations but to show how misleading are the terms used by scientists, how vacillating and uncertain their theories and