the center of gravity of an object is not a physical property you can alter.
its a point in space within the object where you can “balance” its mass making it an ideal point to calculate force application from and be assured accurate results.
its a bit trickier in real life applications but the jist of it is simply that.
the way to “move” the center of gravity of object would be shifting its mass elsewhere, assuming the object is an immutable solid this isnt really practical or possible.
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