Why do two iron balls land at the same time?

I use physical formulas to explain. Let the mass of two iron balls be m 1, m2, the falling acceleration be a 1, a2, the gravitational acceleration be g, the air resistance be f 1, f2, and the falling distance be s. According to the physical knowledge, a1= (m65438+a2 = (m2g

This is the reason why feathers and iron balls fall at the same speed in vacuum, because there is no air resistance in vacuum. ?

From the above analysis, we can see that two iron balls falling from the leaning tower of Pisa will land at the same time, at least in people's view. Unless the mass of an iron ball is too small to ignore the air resistance, or the falling distance is too far, or the timing is accurate to milliseconds, people will find that two iron balls will not land at the same time.

Other ideas:

Explain why feathers and stones don't land at the same time. As we all know, we live in the air, and objects moving in the air will be resisted by the air. Since feathers and stones will be resisted by air, why do feathers land later than stones? Is the air resistance of feathers greater than that of stones?

Of course not. Obviously, a big stone has greater resistance to air than a small fluff, but it falls much faster than a small fluff. Since it has nothing to do with air resistance, what makes feathers and stones not land at the same time? The reason is related to the inertia of the object. Through physical knowledge, we know that the greater the mass of an object, the greater the inertia of the object, and the more difficult it is to change the motion state of the object, just like a person can easily stop a running bicycle, but can't change the speed of a speeding train. This is also the reason why people use gladiator arms as cars to laugh at others' overreaching.

Let's look at the falling feathers and stones. Feathers and stones have little resistance in the air. This small resistance has little change on the motion state of the large stone, which can be ignored basically, but it has great influence on the motion state of the small feather. Very small air resistance can slow down the speed of feather falling. Air resistance is like a person's strength. Feathers are like bicycles and stone heads are like trains. Look,

Understand this truth, it is easy to understand why two iron balls will land at the same time, because both are iron balls, which have great mass compared with air resistance. In a short distance (the maximum height of a tower is only a few hundred meters), the influence of air resistance on the falling time of two iron balls can be ignored, which is also the reason why two iron balls land at the same time.