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I love the fact that the best scientific explanation for this is "Jiggle it up and down"
@Weston Ding sounds like missionary position. too dirty
You could very well illustrate this with a free body diagram and a few momentum equations; the video's explanation is very simplified.
Action lab, you are genuinely one of the best channels on youtube. You have made physics into the most fun and awesome subjects, just with these experiments.You are outstanding man
I don't like his vids a whole lot. Get bored easily
@Josh Young Bond James.
His name is James
Fr, he's the reason I enjoy science now
It's extremely cool you show these unintuitive quirks of nature. I'm sure many viewers find ways to apply them!
@M H sigh
We’re taught it’s intuitive to think we’re spinning a thousand miles an hour, but watch “flat earth in 5 minutes” for another explanation.
"If you jiggle a pendulum really fast it will stand up"That's what she said, dude
I was looking for a comment like this😂
I didn't even pick that up 💀
I feel the length of the pendulum, weight of the pendulum, frequency, and amplitude of vibration would all play a critical role in maintaining stability. the second half of the oscillation when the pendulum is returning to the axis of vibration would need to be timed in a way that would slow the rotation. The rotation force would be a cosine(off-axis angle) function.
I love how simple and small these things are but you are passionate to share it with us. Thank you
What would happen if there was a second pendulum on there? 🤯
Your shorts are entertaining but also genuinely make me think 😂 love it and appreciate it 🙏🏽*Edit* after a second watch it kind of reminds me of those clacker ball toys and now I want some lol
Im actually seeing action labs videos more than my friends these days
We're your friends now buddy, we all learn together here
Well maybe you should tell your friends to catch up with the amount of action labs videos. Then they will have seen the same amount as you.XD
You’ll stay out of trouble
What’s a “friend”?
You have friends?
He's posting new, interesting content with good visual and verbal explanations. Keep it coming bro 👍👏
Love your channel but this actually depends on the frequency of oscialtions and direction, meaning how it's build and what is external input. Usually falling down would mean going to most stable or lowest energy point, and this ain't. This is 'falling up's only when certain conditions are met and it isn't stable. So it's actually not falling up, rather it's aligned with external axis
Your explanation is great, very clear!
At first I was stupefied. But then when he explained how it worked, it all made sense. Thank you, James.
I'm subbed to all the science channels but you always have a fresh experiment I've never seen before and blows my mind.
It involves rotational dynamics too. Good stuff.
The Gladiator said what we do in this world echos for eternity. You inspire, educate, and entertain millions. It must be very gratifying to know that your videos (and your good deeds) will live on forever in those that watch them. Thank you 🙏.
With the right frequency of vibration, you can actually make a double pendulum (or a middle rod with a rod jointed to each end) stand straight up. Even if you allow range of motion in any or all directions at the joints. The simplest explanation I've heard for the effect is that none of the parts have time to fall in a specific direction because their base is vibrating so quickly that they constantly want to fall in other possible directions as well and just remain straight as a result.
Just right. Youre able to explain things just enough in plain english in these shorts. Love these.
You always come up with the most fascinating stuff to show us
“Hey hun can I buy this 200 dollar sawzall?”Wife : “what for?”“Uhhh housework”
It does not have to do with timing per se. It’s simple geometry and trig. While pushing up adds rotation that counters it being upright, moving down adds more restoring force because at that point the angle is greater.
I used to not like learning much or didn't care but this channel is awesome :) God bless
This guy is a genius. I love he finds one thing and clearly demonstrates how it works. Nice 👍
I hope all schools in the world have a teacher this engaging and good
Does this work for any pendulum, or does the oscillation have to be tuned to match it?
I have never seen a wine cork put into vacuum. It contains a lot of trapped air and that is what makes it spongey. I wonder if it would react at all.
oh yeah it expands twice
Just a note: Never wear gloves around power tools. They will get caught in blades and cause more damage then the blade just ripping through your skin.
How ‘n where do these ideas come from? They are so good and random. Makes my day look a lot less curios.
Nice, precise and on the point 😁👍
This guy teaches me more in thirty seconds than my public school has in 10 years
Could this be used for potential anti gravity or artificial gravity technology?
I just love how his thumbnails look like clickbait... untill he actually shows it, and explains how it works!
Very interesting! 👍
Somehow everytime I come back to this channel you manage to blow my mind
So it is not up, but tends to find a stable equilibrium in two orientations exactly on the line of travel marked by the oscillation.
I like your funny words magic man
This is why i love action lab. Everytime thier is something new.
What I learned from this video: if you wanna defy gravity all you gotta do is jump up and down at supersonic speeds
I said it.. I said IT, couple videos ago I said along with some others people that this dude will discover a way to defy gravity itself just for YT shorts.
Fun fact that's also how a crankshaft and pistons in an engine work
So we can use this to create wormhole. I mean it is producing somewhat anti gravity effects.
Lets say the mass is M and length is L, whats the minimum frequency to jiggle it up and down so it will stay in equilibrium
The accel due to gravity is 32.2 ft / sec squared. The acceleration of a sawsall is way more
Yes but can you show us real life application of these principles? Please...from an engineering perspective this has to have been used...like in watches or something 🤔
So you're saying, that if I vibrate fast enough... I'll float away?
Definitely an interesting way to use a saw-zaw xD
Theoretically, it will spin at a certain rpm.
An inverted pendulum is a pendulum that has its center of mass above its pivot point. It is unstable and without additional help will fall over. It can be suspended stably in this inverted position by using a control system to monitor the angle of the pole and move the pivot point horizontally back under the center of mass when it starts to fall over, keeping it balanced. The inverted pendulum is a classic problem in dynamics and control theory and is used as a benchmark for testing control strategies. It is often implemented with the pivot point mounted on a cart that can move horizontally under control of an electronic servo system as shown in the photo; this is called a cart and pole apparatus. Most applications limit the pendulum to 1 degree of freedom by affixing the pole to an axis of rotation. Whereas a normal pendulum is stable when hanging downwards, an inverted pendulum is inherently unstable, and must be actively balanced in order to remain upright; this can be done either by applying a torque at the pivot point, by moving the pivot point horizontally as part of a feedback system, changing the rate of rotation of a mass mounted on the pendulum on an axis parallel to the pivot axis and thereby generating a net torque on the pendulum, or by oscillating the pivot point vertically. A simple demonstration of moving the pivot point in a feedback system is achieved by balancing an upturned broomstick on the end of one's finger.
I like how action lab initially had a lot of haters thinking he only copies from others. Now he makes content that no body ever sees before.
I think this might be the key to the anti gravity flying disk!!
So does the same frequency work with all pendulums?
The conclusion is incorrect. The pendulum will align itself with the direction of the oscillation (forward-backward movement) and not default to pointing up. You can clearly see this when he tries it in a diagonal orientation and the pendulum points the same diagonal direction.
Well.. is doesnt fall up, your keep it up while it searches for its gravitation point, but by doing that you actually manipulate the gravity point, due to slowwness of mass, the bar will stay vertical and stand up..
How would a double pendulum work in this case?
This is the side of TheXvid Shorts that I want to protect
If you dont support it when starting it would it still rise?
This guy really likes to find Glitches in the Matrix.
So when pulling it the force has a different angle then when it's pushing?When pushing the force moves more straight out and when pulling its more affected by the angle of the movement so it corrects itself?I'm trying to understand this but I think I'm onto something
That looks dangerous 😂
I bet if you timed it right and control the speed you also could get it to spin
Can you do it with a double pendulum?
I guess that the constant motion causes the force of gravity to reverse giving upward oscillations right ?Because the pivot point is constantly moving
It wants to line up with the axis along which it oscillates due to the torque around the center of mass of the oscillating driving force
How would this work in low/no gravity?
I love watching these vids late at night to make my brain hurt
0:57 - 0:59 is montage worthy 😂
Dude, how do you think up the ideas for every single one of these videos.
That was a nice abrupt cut. There was literally nothing else that needed to be said.
Construction manager: *ooooh, now I know why these guys can’t finish their work for 2 months already….*
I also do this experiment everyday.However i just learnt what a pendulum is.
Stable equilibriums are joined by semi-stable equilibrium like this. They actually alternate around a system for more complex systems.
I don’t know why him using a reciprocating saw was so funny, but it was
Im pretty sure a pendulum isnt a metal bar, it's a rock tied to a rock that swings back and forth
Would it work with a double pendulum?
Is this related to how a bicycle stays up as you ride it instead of falling over?
Can this technology be used to make a space elevator?
Your enthusiasm for the subject is contagious
Im waiting for the day when he do time travel
And then he'll somehow make it make sense, too
Meanwhile in Australia: if you jiggle a pendulum really fast it actually falls down
i learn more from this channel than school
Wait, but wouldn't the up and down movement negate the whole fact that the pendulum is going up? I get that when the moving part of the pendulum goes down, the pendulum swings up due to inertia, but when it goes up, why doesn't that movement negate that up motion?Actually, nevermind. Whilst writing this I just realized that the guy flips the pendulum up to keep it there, otherwise it would stay in the same place. I'm gonna post this comment anyways for people having the same question.
The underlying reason for this behaviour is the pseudo-force acting on the pendulum in the non-inertial frame of eference
The pendulum doesn't believe in gravity anymore
This man's just made a metronome.
even with gloves on my ass clenched when he put his hand that close to a reciprocating saw
If only this guy provided an actual explanation for any phenomena instead of making random and obvious statements
I love the jiggle explanation because it makes sense too
So what you're saying is if we make something vibrate enough we can create anti-gravity?
An object in motion stays in motion. What a weird concept, right….
My life is a pendulum every time I want to go one way.. I have to go the other way..
The only actual use for a Ryobi sawzall
Me: Alright bois, I need a saws-all and a pendulum.Da bois: for what?Me: were going to space.
Now put a PID controller on the jigsaw and a sensor on the pendulum and get an actual control system going for an inverse pendulum
So if you're on top of a crane and it jiggles will you go up or down?
What on earth would a double pendulum look like
If your explanation holds. Holding the reciprocating saw upward the pendulum should stand atop of its axis! Does it do that??
Ayy I work for Ryobi so this is great to see, thanks for showing off the recip saw (albeit AC)
I believe it's conservation of momentum that's really being in play here?
Yes... Actually due to the fact centre of mass tries to be in stable equilibrium .
I need one of those machines for research
Would this work in space?
Nice i want to see this with string attached to a ball
This is amazing. WOW!!
Hi how are you?