Regarding the equations at the end, danfalkscience states, "the two effects cancel each other out, that's why the rate of fall is independent of the mass". It's interesting that the two effects actually DO cancel each other out, considering mass is involved with seemingly very different phenomena: gravity and inertia (a concept defined independent from gravity).
More relevant is that SIZE determines air resistance. If the balls have the same size but different masses, at the same speed the air resistance force is the same, but the less massive ball has less inertia and so slows down more. Despite the air resistance increasing with the square of the speed, the less massive ball slows down more. One has to make air resistance proportional to mass, like gravity, for this to work. Similarly shaped but variously sized bottles of water are good.
exactly...His experiment should be held in a vacuum room and not at the pisa tower. If the object were dropped from 5.000meters the heavier object would fall faster than a lighter object because of the air resistance.. The difference between the falling object thrown at 56 meters(pisa tower) is not visible to an eye because the objects doesnt reach a high speed so the air ressistance does not affect them a lot.. So aristotles theory is right in non vacuum place and gallileos theory is right in a vacuum place...
This works over short distances, or in a vacuum. However when you consider the terminal velocities.... For an object to hit terminal velocity, the force of air friction must equal the force of gravity, F=ma. The 'a' being the acceleration of gravity, you can see that the variable 'm' means that for objects of higher density more air friction is needed to equal F. In other words, a denser ball must attain higher speeds for the air friction to overcome its weight, and has a higher terminal vel.
Why do they fall at the same time when dropped from the leaning tower? Isn't air present near the Leaning Tower of Pisa? *Nobody* explains this to me and I feel dumb!
nice costumes and idea . Air resistence will affect the football more than the bowlingball because it is lighter, especially when speed gets high for long drops
exactly..His experiment should be held in a vacuum room and not at the pisa tower. If the object were dropped from 5.000meters the heavier object would fall faster than a lighter object because of the air resistance.. The difference between the falling object thrown at 56 meters(pisa tower) is not visible to an eye because the objects doesnt reach a high speed so the air ressistance does not affect them a lot.. So aristotles theory is right in non vacuum place and gallileos theory is right in a vacuum place...
@marcusaureliooze If you read up on it, Aristotle *thought* about it, and decided, without doing any empirical tests. He simply didn't bother. A feather and a hammer are very different objects, in many ways than just their weights. Proper experimenting controls for those differences. Aristotle didn't just say they would fall differently, but in proportion to their weights. Drop 1 and 2 pound balls (same diameter) 20 feet, and the difference should be significant. It isn't.
@marcusaureliooze In my science textbook the Earth includes the different air levels that extend up miles above the Earth's surface. It does not really matter though.
@HK379 An object in space will accelerate towards another object because of gravity. On Earth this is about 9.8 meters per second, but if Earth was heavier. So say you jump out of a plane. You might think 20 seconds later you would be going nearly 196 meters per second, but due to air resistance you will go slower. You accelerate towards Earth at 9.8 meters per second, but if you are air resistant, like a parachute, you will accelerate slower and your max rate of descent will be lower.
according to my evaluation you must remove air friction before you begin the experiment otherwise its nothing..where talking of how fast the velocity of the stones not the outside force.....
@jursamaj They knew about it, but they didn't really define it or give a reason for it. It's like being taught a concept and not understanding it. You can say when it works and how to use it, but can't you say how it works. They knew about the wind, as they showed through their knowledge of sails, but they didn't know why it worked like that.
In the 1640s the astronomer Giovanni Riccioli dropped balls of the same shape but of different weights from the Assinelli tower in Bologna, and the heavier balls always landed first, disproving Galileo's assertion. Funny no one talks about that experiment...
See, for all there smarts, this demonstrates the problem with Aristotle, Plato, and their ilk. They tended to make proclamations of "fact" after thinking about something, and felt doing an experiment to prove it wasn't necessary. :P
ok, so if Galileo had dropped a 30cm balloon filled with hydrogen it would have fallen at the same speed as a 30cm steel ball!! Must be something special about the physics at Pisa
The law that Galileo discovered -- like any law of nature -- applies across particular domain. In this case, the law breaks down if air resistance or buoyancy are significant factors -- as they would be for a hydrogen-filled balloon. (I recommend helium, however; it's safer! ;) )
@insirtusernamehere marcusaureliooze said that atmospheric friction was unheard of back then. As I said, and you've admitted, it wasn't. They were well aware of it. Whether they had it precisely defined & quantified is irrelevant.
ill go with arestotle theory twice as big twice as fast but the experiment will not be in the leaning tower of pisa..100 times the height of the leaning tower .. the twice as big is twice as fast..blackhole, galactic plain pole shift,nuetrinus faster than light. can be computed by not using your equation.. you cannot compute particle faster than light using einstien equation.. thats the law..
@marcusaureliooze Hindsight? How about common sense? If I sit in my room and come up with an idea, the next step is to check if I'm right. These philosophers felt that experimenting was "beneath them", so their proclamation was sufficient. It doesn't take hindsight to know that's foolish.
the force should be equivalent to the force in galleleo expirement at high scale.. say what?you cannot do this do it.at both ends. plus and minus after that you think....
The narrator sounds like Sheldon Cooper.
DarqeDestroyer That's how us nerds sound. Its just a fact of life.
Regarding the equations at the end, danfalkscience states, "the two effects cancel each other out, that's why the rate of fall is independent of the mass".
It's interesting that the two effects actually DO cancel each other out, considering mass is involved with seemingly very different phenomena: gravity and inertia (a concept defined independent from gravity).
More relevant is that SIZE determines air resistance. If the balls have the same size but different masses, at the same speed the air resistance force is the same, but the less massive ball has less inertia and so slows down more. Despite the air resistance increasing with the square of the speed, the less massive ball slows down more. One has to make air resistance proportional to mass, like gravity, for this to work. Similarly shaped but variously sized bottles of water are good.
exactly...His experiment should be held in a vacuum room and not at the pisa tower. If the object were dropped from 5.000meters the heavier object would fall faster than a lighter object because of the air resistance.. The difference between the falling object thrown at 56 meters(pisa tower) is not visible to an eye because the objects doesnt reach a high speed so the air ressistance does not affect them a lot.. So aristotles theory is right in non vacuum place and gallileos theory is right in a vacuum place...
thx, it's grea to see how should be being there in the galilei's time
Thanks Dan!
This works over short distances, or in a vacuum. However when you consider the terminal velocities.... For an object to hit terminal velocity, the force of air friction must equal the force of gravity, F=ma. The 'a' being the acceleration of gravity, you can see that the variable 'm' means that for objects of higher density more air friction is needed to equal F.
In other words, a denser ball must attain higher speeds for the air friction to overcome its weight, and has a higher terminal vel.
Why do they fall at the same time when dropped from the leaning tower? Isn't air present near the Leaning Tower of Pisa?
*Nobody* explains this to me and I feel dumb!
Damm, same here
dude, you're such a help with my A-Levels. really apreciate the Video
Galileo's "falling bodies" experiment re-created at Pisa - 23,000 views
Chinese girl on the right - 6,423,086 view
Not ironic at all
Loved this video. Show it in my Physics classes every year, but now the sound is gone. Only the music work. I hope you can fix it.
yeah what happened?
nice costumes and idea . Air resistence will affect the football more than the bowlingball because it is lighter, especially when speed gets high for long drops
exactly..His experiment should be held in a vacuum room and not at the pisa tower. If the object were dropped from 5.000meters the heavier object would fall faster than a lighter object because of the air resistance.. The difference between the falling object thrown at 56 meters(pisa tower) is not visible to an eye because the objects doesnt reach a high speed so the air ressistance does not affect them a lot.. So aristotles theory is right in non vacuum place and gallileos theory is right in a vacuum place...
True!
and the apollo 15 feather and hammer experiment confirmed it even further
Yep!
@marcusaureliooze
If you read up on it, Aristotle *thought* about it, and decided, without doing any empirical tests. He simply didn't bother.
A feather and a hammer are very different objects, in many ways than just their weights. Proper experimenting controls for those differences.
Aristotle didn't just say they would fall differently, but in proportion to their weights. Drop 1 and 2 pound balls (same diameter) 20 feet, and the difference should be significant. It isn't.
Let me see if I get this right. So if the lighter object falls faster, she is a witch? ; ) Nice work Dan. Very professional.
Can you fix the sound please?
Try this experiment with a Big kishta, ans a small kishta
Good video!
@marcusaureliooze In my science textbook the Earth includes the different air levels that extend up miles above the Earth's surface. It does not really matter though.
Does the voice on this video sound really weird to anyone else?
Nope.
@HK379 An object in space will accelerate towards another object because of gravity. On Earth this is about 9.8 meters per second, but if Earth was heavier. So say you jump out of a plane. You might think 20 seconds later you would be going nearly 196 meters per second, but due to air resistance you will go slower. You accelerate towards Earth at 9.8 meters per second, but if you are air resistant, like a parachute, you will accelerate slower and your max rate of descent will be lower.
according to my evaluation you must remove air friction before you begin the experiment otherwise its nothing..where talking of how fast the velocity of the stones not the outside force.....
@jursamaj They knew about it, but they didn't really define it or give a reason for it. It's like being taught a concept and not understanding it. You can say when it works and how to use it, but can't you say how it works. They knew about the wind, as they showed through their knowledge of sails, but they didn't know why it worked like that.
In the 1640s the astronomer Giovanni Riccioli dropped balls of the same shape but of different weights from the Assinelli tower in Bologna, and the heavier balls always landed first, disproving Galileo's assertion. Funny no one talks about that experiment...
Yea
See, for all there smarts, this demonstrates the problem with Aristotle, Plato, and their ilk. They tended to make proclamations of "fact" after thinking about something, and felt doing an experiment to prove it wasn't necessary. :P
ok, so if Galileo had dropped a 30cm balloon filled with hydrogen it would have fallen at the same speed as a 30cm steel ball!! Must be something special about the physics at Pisa
The law that Galileo discovered -- like any law of nature -- applies across particular domain. In this case, the law breaks down if air resistance or buoyancy are significant factors -- as they would be for a hydrogen-filled balloon. (I recommend helium, however; it's safer! ;) )
If it was in a vacuum without air, yes. However, air resistance is a major factor. Learn physics before saying ignorant things
@insirtusernamehere
marcusaureliooze said that atmospheric friction was unheard of back then. As I said, and you've admitted, it wasn't. They were well aware of it. Whether they had it precisely defined & quantified is irrelevant.
The sound is fuct
anyone from 2022
ill go with arestotle theory twice as big twice as fast but the experiment will not be in the leaning tower of pisa..100 times the height of the leaning tower .. the twice as big is twice as fast..blackhole, galactic plain pole shift,nuetrinus faster than light. can be computed by not using your equation.. you cannot compute particle faster than light using einstien equation.. thats the law..
I liked and subbed
@marcusaureliooze
Hindsight? How about common sense? If I sit in my room and come up with an idea, the next step is to check if I'm right. These philosophers felt that experimenting was "beneath them", so their proclamation was sufficient. It doesn't take hindsight to know that's foolish.
What are you talking about? All of ancient physics were based on observation. What Aristotle taught is still 100% valid:
arxiv.org/pdf/1312.4057.pdf
the force should be equivalent to the force in galleleo expirement at high scale.. say what?you cannot do this do it.at both ends. plus and minus after that you think....
Aristotle was *always* wrong
Galileuu
This guy really posted this with the worst stereo audio of all time. This should be called migraine simulator. Absolutely cringe inducing