An example of breaking the inertia thinking

Galileo broke through the traditional concept, inferred that the speed of falling body should not be determined by weight, and finally proved his point of view through the experiment of free falling body.

Aristotle (384-322 BC), an ancient Greek thinker, once asserted that the speed at which an object falls from the air is directly proportional to its weight, with the heavy falling fast and the light falling slowly.

It was not until16th century that Galileo (1564- 1642) discovered the logical contradiction of this theory. Galileo said that if a big stone falls at a certain speed, then, according to Aristotle's judgment, a smaller stone will fall at a correspondingly slower speed.

Galileo further assumed that the speed at which an object falls has nothing to do with its weight. To prove this point, one day in 1589, Galileo, a 25-year-old young mathematics lecturer at the University of Pisa, came to the leaning tower of Pisa with his debating opponents and many others. Galileo climbed to the top of the tower and dropped an iron ball weighing 100 pound and one pound at the same time.

Under the eyes of the public, the two iron balls landed almost parallel. In the face of this ruthless experiment, everyone present was dumbfounded and at a loss.

This beautiful story, praised by the scientific community as the "Leaning Tower of Pisa Experiment", proves with facts that objects with different weights fall from the same height and have the same acceleration, and they will land at the same time, thus overthrowing Aristotle's wrong judgment. This is the law of free fall, which Galileo proved and now people know. "

Extended data:

This legendary story was handed down by vivienne, a student of Galileo. When viviani wrote Galileo, he mentioned that he heard that Galileo repeated many experiments from the top of the leaning tower of Pisa in the presence of other professors, philosophers and all the students, which proved that light and heavy objects landed at the same time. There are different opinions about Galileo's experiment on the leaning tower of Pisa.

Some people say that he landed with two balls of the same size but different weights (probably iron balls and wooden balls) at the same time; Some people say that he experimented with shells and bullets. Others exaggerate the significance of this experiment, saying that he was the first to do the free fall experiment, which overturned Aristotle's mistake in one fell swoop.