Earlier quoted context omitted.
There was no such study. Galileo showed this was false with the following famous thought experiment : Suppose it were true. Join a heavy rock and a light rock by a cord and drop them from a tower. If the light rock falls slower, eventually the cord will be pulled taut and retard the fall of the heavier, so this system falls more slowly than the heavy rock alone. But the system is heavier than the heavy rock alone, so…
Maybe Galileo did not, but others have. The gold standard is a model that explains that behavior, and experimental studies that work as the model predicts. The model that big ricks fall faster makes sense, but it isn't backed by experiences. Many studies have seemed to show something but in fact the authors just didn't realize they had to control for something important (sometimes an accident, sometimes outright scie…
"The experiment did take place in Delft in 16th century the Netherlands, when the mathematician and physicist Simon Stevin and Jan Cornets de Groot (the father of Hugo de Groot) conducted the experiment from the top of the Nieuwe Kerk."
https://en.wikipedia.org/wiki/Galileo%27s_Leaning_Tower_of_P...