[Youtube Review][Veritasium] Chain Drop Answer 2

(Recommended)Popular Videos : [Veritasium] Chain Drop Answer 2

 

This time, I will review the popular YouTube videos.

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To save your busy time, why don't you check out the fun contents, summary, and empathy comments of popular YouTube videos first and watch YouTube?

(Recommended)Popular Videos : [Veritasium] Chain Drop Answer 2

https://www.youtube.com/watch?v=X-QFAB0gEtE

 

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Summary Comments : [Veritasium] Chain Drop Answer 2

Ka***********:

It's a flawed experiment because both weights are not dropped, one weight is still attached to the ground via the chain... Newton's laws of gravity have not been broken, all objects still fall at the same speed / rate of 9.81meters per second squared... Centrifugal force is the culprit that adds the extra force and speed...... A weight attached to a chain or bungee cable, has a axis and will swing outwards a little due to centrifugal force, you can see both the weights do not travel straight down, but the chained weight travels a bit further outwards, away from the wall, because it has swung on the chain as if it has an axis, in fact a chain has multiple axis, to create a whip effect as mentioned in the video, which is correct, the whip effect perfectly conserves and carry's momentum fluidly as a cumulative wave, whose decrease in wave size leads to an increase in wave speed, towards the end of the whip... To illustrate another basic example, of centrifugal force adding to gravitational speed, it is mentioned by someone else on here,,, A swinging metal lever on a axis, will fall faster than 9.81m/s2...

 

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Playtime Comments : [Veritasium] Chain Drop Answer 2

Th*******:

0:07 love how he sounds American with hard Rs but then has the most Aussie countdown ever

Pa************:

2:28 that’s what she said

Lu*****************:

1:02

Gi***:

0:07 u made it ! you're first video was 37 seconds but u have found the essence of the video and pushed it in 7 seconds of the second video wow

La**************:

Long shot, does anyone know where the music comes from at 0:30?

If memory serves, it might be a default song on Garageband? Am I remembering that right? I can't find it anywhere.

Ih*****************************:

1:01

Xe*****:

2:10

Se***************:

1:01 GOOD JOB YOU DROPPED SOME WEIGHTS YOURE A BIG BOI NOW

Ch******:

@1veritasium @2:10 that is a place near Queenstown New Zealand is it not?

Ar****:

1:01 LMAO LOLOLOLOL

 

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Top Comments : [Veritasium] Chain Drop Answer 2

jo*******:

Obviously he didn't drop the weights at exactly the same time. But....we can use the horizontal lines in the stone block wall as a basis of comparison. The weight on the left (his right hand) had a head start and was ahead until the halfway point...afterward the other weight accelerated passed it. I'm no physics major, so here's my guess as to why this happens. 

The mass of the weight on the left is constantly decreasing as it falls. Think of about it....the mass is the combined weight of the dumbbell plus the weight of the chain above the "slack point" (Or whatever term is correct.) This mass is decreased as the length of the chain above the "slack point" decreases. Since it requires more force to move something that's heavier, can't we assume that gravity has to pull harder on the heavier weight? And since the mass of the object is constantly decreasing, wouldn't that suggest gravity is pulling "harder" than it needs to...thus causing the object to fall faster?  

I guess we need to try chains of different weights and see what happens. Any input? 

St********:

"It felt fast. A great increase in speed". What is he comparing this experience to... the time he jumped off the bridge without a bungee cord?

fa*****:

Back when he still conveyed some of that Australian accent!

D*:

Me watching him change so much from 2011 to 2019

Fr********:

Fascinating. Now, I crapped myself when doing a bungee jump. How does that affect my acceleration?

Sy******:

Aaawww... stop making me picking the wrong answer. I wanna be right.

Ge**************:

The center of mass of the system with the chain is lower than that of the system without the chain. If the chain had no mass then the two objects would hit the ground simultaneously. Isn't this an other way to predict the result of the experiment?

ai*********:

That moment when you lack the fundamental physics needed to understand that they should be the same speed so you say the chain b/c it's heavier...whoops. Learned something today!

DB*******:

And we’re still throwing people off this bridge in Queenstown, New Zealand!

Ja***********:

i love how this awnser video has only half the views

Ni*****:

Nobody:

Youtube: Let's recommend this video 9 years later...

An*******:

Hey, I know where that bunging place is in, it's in New Zealand! I've been there.

PT******:

I like how he has just a hint of an Australian accent. lol

Ri**************:

“When I went bungee jumping”, that’s a sentence that I will never utter

Ja***********:

Your scream is hilarious xD in the name of science!

Me******:

When you learn video editing from a former bollywood editor

Gr******:

"the chain accelerates the object like a whip would"
that may be true, but i thought like, the chain is divided into 3 parts: the part that's fixed in place, the bend, and the end that's tied to the object. And i thought that part one weighs like it would normally, part #2 aka the bend is weightless, since in this case its moving along the chain which leads it down, and part #3 aka the end w/ the object which weighs as much as the object + the chain combined. So if you have a chain tied to an object, of course its gonna fall faster than the normal one!

cn*****:

omg i went there to bungee jump last year! IT WAS AWESOME

Su*********:

F you think about it this way... the MASS of the chain/weight combo accelerates, but mass is removed as the acceleration gets going, letting potential energy transfer into the falling chain gaining speed from the process.

Je********:

"OH MY GAHHHHHHHHD!" That's hilarious, dude.

Ka**********:

Veritasium I think I have a better answer for this, here it goes
the weight tied to the chain and the weight without chain does not he their centre of mass at the same height. The weight tied with the chain have it's centre of mass a slightly lower in space due to the weight of chain. Hence it reached earlier.

Jo*******:

so now the question is this a liner growth pattern of acceleration or is it exponential growth pattern or I.E. if the chains/rope was longer wound the acceleration continue or would it hit a terminal speed I.E. like a unchained object falling at terminal velocity is there a terminal velocity for the added mass/length of with more length will the speed grow greater and greater?

Dr********:

Considering no mass attached, length l(=l/2+l/2), one end fixed on ceiling, the other in free fall, total mass M, distance from the ceiling x(t), energy conservation gives velocity x’^2 =gx(2l-x)/(l-x) and via Laplacian, acceleration of the free end x”(t)=g(x^2+2l^2-2lx)/(2(l-x)^2) which is greater than g. For x=l x” becomes infinite- whiplash effect !

j*:

You just taught me why do ropes/ chains whip in a minute, You legend

On******:

Hi, I'm youtube, let's recommend this now, 9 years later!

Ma******:

Plot twist: The chain does not reach the ground.

Th**************:

I picked the weight w/o the chain, thinking that aerodynamic drag on the chain would slow the other weight (I also wondered how the additional weight of the chain would affect its fall).  With that said it appears that the weight with the chain starts out slower than the weight without, but the chained weight accelerates much faster.  At the top 1/3 of the drop the chained weight is above the unchained weight, but by the bottom 1/3 the chained weight is below the unchained.  Is this due to the higher mass of the chain requiring more energy to get it moving?  The previously mentioned aero drag?

Qu***:

As one end of each link is stopped from falling, and comes in line with all the links above it, the free falling end of each link continues to rotate, like a lever, imparting tension to the next free falling link.

The chain is a series of short levers, each rotating, in turn, and pulling on the falling link behind it. The kinetic energy of each falling link is transformed into rotational energy, which gives up its energy to the free-falling end of the next link, causing it to rotate. Slow-mo photography would be a great way of showing what is happening.

Same thing can be seen by dropping a yo-yo attached to a string. You'd think that the yo-yo would fall, same speed as a rock. But the tension of the string attached to your finger causes some of the kinetic energy of the falling yo-yo to be used to impart a spin to the yo-yo. Since the total amount of the energy in the system must be constant, the yo-yo is seen to fall slower than it would if it were simply dropped.

 

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[Veritasium] We gathered comments about popular videos and looked at them in summary, including play time, and order of popularity.

It's a good video or channel, but if you're sad because it's too long, please leave a YouTube channel or video link and I'll post it on this blog.

 

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