What is Centripetal force?

[@THR17]

The movement of gears in casting process animation is opposite to what really happens... except that everything is so clear to understand...thank you Sabin

[@JWolfe-nq7nq]

Ha.. Yes. A whoops.

[@m.s.5370]

Probably just someone on the animator team not paying attention... but it doesn't make it harder to understand, nor does it detract from the video, so it's not really that big a deal imo

[@albertbatfinder5240]

It’s super interesting though. Animation let’s you play God and defy all the rules of logic, let alone physics. I wonder if there are examples in major film productions where the animator unintentionally slipped up? There are millions of examples of the animator intentionally mucking about. Think of that pause in mid air when Wiley Coyote runs off a cliff and has his moment of self-realisation.

[@JWolfe-nq7nq]

@@albertbatfinder5240 heh. Using Willey Coyote in a serious, scientific video on gravity *would* be apropos, yes? /s

[@michaelmueller7839]

Was just going to add the same comment about the gears.

[@jeffweber8244]

Great video. When we get in a spinning ride and “feel” centrifugal force, what we’re feeling is a combination of our inertia trying to carry us in a straight line and the ride deflecting our path to the center (centripetal). That is why it is called a pseudo-force in physics.

[@DJ-Brownie-UK]

woah woah there is science and pseudo science , using the term pseudo to double barrell ANY scientific aspects like pseudo-force is utter nonsense and a clear abuse of language to sooth the pain of the ever growing problem of the many crumbling scientific theories, theories that Schools teach children to believe as real facts.

[@PunnamarajVinayakTejas]

Yeah. I like to think of it as "you are not getting pushed outward, but the car is pushing you inward"

[@SpybottleMessuage]

The centripetal force is the force that applied to the center of the spinning, and the centrifugal force - actually, that the force that applied at the point of centripetal force, but in opposite direction - from center of the spinning outward. If you disbalance those forces, for example, cut the string that holding the spinning object, the spinning object will fly away from the spinning spot. The sport discus thrower is the example - spinning man throwing the discus as like centrifugally accelerated.

[@veivoli]

@@SpybottleMessuage Sorry for coming in late - I've just found this... If you cut the string the object will continue with the velocity at that time (remember, velocity is a vector and has both magnitude and direction) and travel at a tangent to the orbit in the direction it was travelling at the instant the string was cut. If centrifugal force were real it would travel along a radius away from the centre. Again, the discus travels along a tangent, not directly away from the centre. There is no centrifugal force in an inertial frame of reference. As explained in the video centrifugal force is a pseudo force used to explain observations in a non-inertial frame of reference.The unbalanced *centripetal* force accelerates the body towards the centre of the circle.

[@gokulaashiq9372]

Thanks ❤

[@maheshmanani2991]

Please keep making such science relevant videos, it helped me crack the logic of centripetal force! Thanks!

[@shreyachaudhary141]

Amazing visualization , we want more such videos.

[@SabinsMathew]

Coming sooon!

[@1979Spica]

Did you miss the part where the gear turned the cylinder the wrong way? This is impossible

[@SquirrelTheorist]

@@1979Spica I saw that too but the rest of the animation was intresting

[@TomSky00]

is it tough? watch from 3m25sec and see how magic works.

[@turgidbanana]

You don't speak for everyone

[@TheUkdan02]

I don't know why this was recommended, I don't know why I watched it and now I am left struggling to understand something I previously didn't know existed. This is why I can't sleep at night!

[@flame_axe]

This video is better than most teachers

[@sourav3000-h4x]

it is the 1st video with pure and fully correct concept of centripetal and centrifugal force... 🔥🔥🔥❤️❤️

[@DrDeuteron]

in inertial frames, only.

[@kri249]

I remember learning about centripedal force. The example demonstrated were weights on a spring sealed in jars of liquid on the end of a rotating plank of wood. It was obvious that the fluid was the dominant force thst pushed the weights towards the centre. So calling it a "pseudo" force feels very appropriate.

[@gordonwaldner9792]

I learned this ingrate ii, 55 years ago. Thanks mr. Mantyka.

[@tricotdiko1435]

Maybe you’re the ingrate?😂

[@FalkFlak]

As with most such explanations few answer the ACTUAL question people have: why they "feel" a force acting away from the center! This explanation only makes sense in mathematical way. It's very easy, though: Just recognize the tangential motion/force always points outside the orbit, away from the center. Of course you need a force to the side to make the motion a curve. Thats what the video explains in all elaborateness. But look at it the other way. If you have no "anchor"/a force to hold on to like gravitation, a rope etc. the object always moves away from the center (in a straight line 90° to it). And the faster you move the more force you need to apply to not move away from the center. Sitting in a car driving in a bend the asphalt's friction (the "force" to the center) holds the car in line but YOU as the driver move outward basically hitting the inner side of the door constantly as it keeps getting "in your way" on your tangential motion away from the center.

[@okaro6595]

Centrifugal force is no different from the force you feel in a car when it accelerates. The rotating object accelerates towards the center. Of of the key concepts that lead to general relativity was that you cannot tell the difference between acceleration and gravity my measuring it on a single point.

[@FalkFlak]

indeed

[@anmirfan6447]

Wow great explanation but another reason might be becoz example ur on a ride with walls attached behind u, ride is moving 360 degrees and Ure acting ur weight on the walls so this force is acting towards walls, something like that ?

[@FalkFlak]

Yeah, Something like that. If you throw a baseball in a rotating fashion and then let loose, the ball flies 90° straight away from your arm and not in the direction your arm points. It's like pushing the ball to the side but also changing the direction the whole time whats causing the "centrifugal feel" as if the ball wants to fly in the direction you point with your arm. But at no point is there any push in that direction. The feel is the pull you need to make to change the direction of the ball (which tries to continue in a straight line and so is pulling on your arm). So there is a tangential force outside that rotation - otherwise the ball wouldn't fly and you wouldn't need to pull it to make a circle.

[@rjones6219]

"YOU as the driver move outward". Wrong, the door is moving towards YOU, and it's the door that hits you.

[@ivymike3459]

THANK YOU! I’ve never had a clear understanding of the difference until now.

[@xavierhood8165]

The best video ever I hve seen till now on centripetal nd centrifugal force..

[@kronigen]

this clears up my confusion I had for years. Thanks!

[@manishbhatnagar82]

SIR, YOUR EXPLANATIONS ARE BEAUTIFUL, PLEASE ALSO INCLUDE SOME NUMERICALS PROBLEMS, AND THEIR SOLUTIONS ,IT IS A REQUEST , YOU ARE A REDEEMER OF PHYSICS.

[@itsanoynomous3253]

Great explanation!

[@N0B0DY_SP3C14L]

Excellent explanation with one possible point of debate. Gravity. Some would treat it as a force, others would treat it as an effect.

[@thefreedomguyuk]

Only some of them would be right .

[@vidxs]

I know something else, just add dirt and some gold to that water. Odd

[@aviaryan9925]

3:35 *Somthing to keep in mind for the next video* Gears and casting are both rotating in same direction. They should be opposite. Otherwise, very good explanation and animation

[@shanemcdonald4750]

omg thankyou... I was so deep in thought on Newtonian forces, and then bam! Like a car with its high beams on, my eyes are am fixated/stuck watching gears move in physically impossible ways while trying to understand physics!!! haheheh... I immediately scrolled down to see if I was the only one, but you saw it to. Good! I am happy it wasn't the drugs!

[@mr.rachetphilanthrophist601]

Good catch.

[@deltalima6703]

CGI is garbage and thats why. Just video a glass of food colored water, its not that hard. I was wondering if the slope of the liquid was zero at the center, but guess what? CGI. Cant trust it.

[@yuurishibuya4797]

Subscribed! You just explained one of the school time mystery’s beautifully.

[@googleeye196]

Such a really helpful content. 😀😀😀

[@bon1999]

Thank you so much. This is a must watch video for every learner.

[@Sophss-q6h]

This just cleared up a 7 years dilemma for me

[@Nature-nw1vx]

I have watched some videos of your channel. Every video of your channel is very interesting. It helps me to understand and visualize the harder topic of my academic syllabus. (From Bangladesh)

[@TheMatrixRevealed22]

This video should be called - *"idiot-centric model by the gang, Jesuit Order mkUltra mind control = 🤡's & zombieland 🧟‍♂️ variants"* 🔴 🤷🏾‍♂️ 🔵 #followthewhiterabbit 🐰 🕳

[@OriginalBishal]

Logically speaking, you cleared all my concepts

[@micheldegauch2072]

3:30 how is the gear moving the metal bar that way ??

[@SabinsMathew]

You have a sharp observation skill :)

[@Mætthæw]

@@SabinsMathew lol

[@jdsaaa66767]

That was uncomfortable to see

[@Mechonzzzz]

Nice bro Good skill...

[@aliensoup2420]

lazy animators

[@chrisg3030]

Thanks for such a clear explanation. I have some questions though. 1) When the tension is released and the object flies off, what direction does it go in? Perpendicular to the radius of the circle at that point because there's no longer an inward force acting upon it to prevent it from obeying Newton's 1st law? If so that would be yet another demonstration that no such thing as a centrifugal force was acting upon it, otherwise it would fly off in the direction opposite to the center. 2)1:41 "More the centripetal force more the object's deflection". If the centripetal force were to remain perpendicular to the direction of motion could it ever be great enough to cause a perpendicular deflection? 3) We know that planetary orbits aren't exactly circular but elliptical. How would you explain this with an animation of the sort you used with the tennis ball?

[@horsethi3f]

I’ll make an attempt. 1. Yup, it would fly off following the velocity vector (tangent to the circle at that point). There might be some confusion regarding centrifugal force, it’s perpendicular to both the velocity vector and centripetal force. 2. It won’t be completely perpendicular because the centripetal force cannot cancel off the velocity perpendicular to its direction. 3. It’s because the force of gravity depends on distance. There’s some nice animations if you lookup Keplers equations.

[@chrisg3030]

@@horsethi3f Thanks

[@PunnamarajVinayakTejas]

@@horsethi3f Centrifugal force is in the opposite direction to centripetal force, not perpendicular to it. I hope to offer a more precise answer to 2: The "deflection" is the radius of curvature. Any amount of centripetal force can cause a deflection of 90 deg over some period of time. An instantaneous change would mean a 0 radius of curvature, or an infinitely high force.

[@venkybabu8140]

Friction and surface tension in mega orders of magnitude. When you spin something on the surface of water it has vortex and ripples. And if you put something nearby it creates a spin and motion around the vortex no matter what because of surface tension and drag components. Vortex usually get bigger for both because of interaction. Usually vortex never grow. Big Bang is something to do with huge split of two vortex.

[@akshitbeniwal5400]

NICEEE , ACTUALLY RECENTLY I'M STUDIED ABOUT DYNAMIC IN CIRCULAR MOTION AND WHEN I SEE YOU'R VIDEO CONCEPT BECOMES CRYSTAL CLEAR 🙂

[@KryptonOg-zw3ew]

Cbse class 11th right?

[@arslansattar351]

@@KryptonOg-zw3ew .

[@guadalopez3610]

Excellent video, the graphics made it all very clear!!

[@RojinSharma-c8l]

Great explanation for concept building.

[@raviteja9665]

Damn, kids these days are so lucky, I remember when I was a kid. I was scratching my head to understand the clear difference between Centripetal and Centrifugal. This video is so good that if you have interest to learn, you can learn in 15 minutes

[@progressor4ward85]

I suggest they are the same. It's just a matter of the perspective of the position of the observer. For instance, going around a tight curve, banking the turn forces the vehicle to push against the road. However, at the same time, the road pushes against the vehicle. One being centripetal the other one centrifical, so from an outside observer, he would see both forces as the same. But from the roads perspective and the vehicals perspective, they are different.

[@dog1337]

This video was actually really useful we need more videos like this

[@memirandawong]

I had a feeling this video would clear things up for me! Thank you.

[@j1sh109]

Best concept video ever on this topic. Thank you ❤

[@petervendetti2796]

Great job your explanation was very intellectually clear

[@nickmcguirk5993]

Good explanations! Ok so what is even more mind blowing is, how the moon keeps moving. That’s huge inertia.

[@akshatsingh5363]

I was struggling with this concept Thanks for clearing this

[@bitshtannicajohnson6957]

*I really like well put together videos with amazing graphics and great explanations ~ This, however was not one of them!*

[@uthumanansari2328]

Wonderfully explained and great animations. Thank you so much!

[@Spahija42]

THANK YOU! For some reason I hate hearing people say centrifugal force.

[@monkeydluffy9274]

Best explanation so far

[@sanathsangeeth5075]

Use full video thanks 👍💥

[@Anas_Khan_04]

52K Mubarak ❤❤❤

[@stritax9478]

The most underrated channel

[@mr.ayush20070]

best visualisation ever..Tqsm sir ji

[@carcucov]

Excellent and clear! Very nice explanation.

[@boofang10]

Well crafted video !! 😁👍🏻👍🏻 .. will certainly help my students understand better

[@harisahmed1617]

Honestly best explanation ❤️

[@colinnorthover1135]

Have you lost your marbles?? Clearly not !! (even when they shoot off the canvass 😄). This is yet another wonderful piece of inventiveness...."Fibonacci meets fluid art" is how I would categorise this technique. Certainly the finished work is so redolent of the spiral types you mentioned in the narration, but for me, it is most strikingly reminiscent of the amazing appearance of the cross-section of shells of the nautilus (a marine mollusc). The resemblance is most obviously to the shape, but often the inner surface of these shells, especially in the smallest and most tightly curling components at the centre, can be coated in vivid irridescent hues of blues, greens, purples and pinks...."mother-of-pearl-like"..... just like the palette you chose today 😮😊..... A wonderful reminder of the amazing beauty and complexity to be found in nature.....and all thanks to a "meandering marble under centrifugal and centripetal forces" 😮❤

[@sundareswaransenthilvel2759]

Thanks! It's simply Amazing and Intuitive.

[@memesspecial568]

Amazing work keep going

[@eitantal726]

centrifugal force is what you feel, centripetal force is what the outside observer sees, that keeps you spinning & changing your velocity

[@apoorvshukla1440]

Oh my God I can,t explain how easily you explain this

[@kevinbrown7219]

A great explanation. Thank you.

[@shawnandrew2545]

Great visuals. Just need to reverse the direction of the drive gears acting on the cylinder with molten metal. The one depicted is an impossible action-reaction event. Also, "acceleration" is spelled with two e's vice three a's. Minor distractions to a wonderfully simple translation of the target concepts so thanks!

[@minhkhoi8087]

Can you explain to me what will happen when the tennis ball reaches the top and the vertical component of the tension becomes zero. Like why the ball wouldn't fall down? There is no more vertical component

[@tand9854]

@@minhkhoi8087 that can never happen since the string will be horizontal and there cannot be a vertical component from the tension to balance the weight of the ball.

[@snape0001]

Awesome explanation

[@TheEulerID]

It's acceleration that's necessarily in the direction of force, not velocity. A car that is braking will be accelerating in the direction of the force, but it's velocity will be in the opposite direction. For a car travelling at a constant velocity, the net force operating on it is zero as the force driving it forwards is exactly cancelled out by the forces of air resistance and friction that oppose it.

[@mr.rachetphilanthrophist601]

No, you wrote the other way, it's velocity would be in direction of force, because object is not turning back due to breaking, and it is accelaration that would be negative (as it retards the car) and change direction.

[@TheEulerID]

@@mr.rachetphilanthrophist601 Firstly, it's braking not breaking. Secondly if a vehicle is slowing down, then both the force and the acceleration are in the opposite direction to its velocity as will be the force. What I wrote was the acceleration is in the direction of the force and that is always the case. If the velocity is considered to be positive along the line of travel and the vehicle slows down, then both force and acceleration are negative. However, if the velocity in the line of travel is negative (that is going the opposite direction), then both the acceleration and force will be positive. This all depends on the frame of reference and in which direction along each axis that the displacement is considered to increase. Usually that's drawn as left to right, but that's just convention; mathematically it works either way.

[@rclrd1]

The video gives a nice explanation of centripetal force but it's ruined by the ridiculous statement at the beginning: _"in mechanics we generally see velocity in the direction of the applied force"._ What nonsense! It's _acceleration_ of course, not _velocity,_ that's aligned with applied force (Newton's 2nd law). At any instant the relation between the velocity of a moving object and a force applied to it is completely _arbitrary._

[@relentless3727]

Great video sir!

[@letsplaygaming6434]

Thanks bro!! that ball explanation was so much needed I tried to think of it but could not figure it out on the paper maybe I am not smart enough(class 10 :)) or whatever thanx..

[@lloydolafson9660]

Your an excellent teacher, you explanations are very clear and easy to follow.

[@markfox1545]

*you're. *your.

[@jaydeepdobariya3198]

Excellent explanation...

[@fearlessly89]

Great work ..keep it up

[@ravikant4692]

Best explanation ever

[@getsmarter5412]

Wow, this really describes my whole life, down to the electrons circling the nucleus of every atom in my body. And my love life. You know, should I stay, or should I go?

[@rohitsharan7380]

Nice 👍 one dude

[@andyveh221]

At 0:22 force is a change of velocity, thus acceleration. At 1:05 it's a polygon first, then a circle; otherwise great animation and explanation. At 0:01 and 2:30 it's not necessary to have the Earth rotate in sync with the orbit, and in that case it wouldn't be the Moon. (Acceleration is misspelled.) At 3:00, gravitation, tension, friction producing centripetal force, right on! At 4:00 rotate with the person instead. Again, otherwise great animation and explanation of the non-existence of the pseudo-centrigual-force. Overall, as far as the intent of the video is concerned, explaining centripetal force, this is almost perfect.

[@andyveh221]

It would be really great to be with the observer on the rotating platform. Obviously from that point of view the block seems not move, thus forces balance each other, and hence possibly the need for a centrifugal force (which shows up in the equations). But now measure these forces within the rotating system: the inward static friction can be measured but the outward force that ought to balance it cannot be measured - because it doesn't exist, not even within the rotating system. Ergo, the concept of centriifugal force is bogus either way.

[@hsmdh]

best channel ever

[@Siraj1987]

Amazing explanation.. loved this..

[@Grundle-buddy]

Centrifugal could be seen the same as when someone says that if you push on a wall it pushes back on you with equal force. Centripetal holds an object inward. Centrifugal is the equal and opposite part. Dang that was brilliant! lol

[@hussainfawzer]

I didn’t understand this centrifugal force when I studied physics in school and now also I don’t understand, except now I’m physics math double major… When I say people that sometimes we can solve physics and math problem without even understanding what’s goin on, they laugh at me. But I’m not going to lie to myself simply because I can solve the mathematical problems related to that topic.. Sometimes, I wonder, is there anyone who really understood this or everyone acting like they have figured it out, just like me..

[@PlanetIscandar]

Everything is exactly as you say, but unfortunately there are not many like you who admit it or who have realized it. Physicists disagree to this day about whether or not (and when) the centrifugal force exists. I have been concerned with this topic for decades and until now I consider this force as real, until someone explains the reality to me comprehensibly and convincingly.

[@amramjose]

Can you comment on "artificial gravity" by rotation? I I know gravity depends on the mass of the object(s) and said rotation will work in a very limited fashion, and only if the person or objects on the rotating surface are stationary.

[@showingYOUtheworld]

PLEASE, Send ASAP a couple of videos like that one to all movie directors and CGI creators in Hollywood !

[@Dekoherence-ii8pw]

Those guys need to learn to animate juggling, and people playing guitars and drums too!

[@Harsh-d4z]

Thank you i understood my concept 🙂

[@catkeys6911]

0:33 Let's figure it out with an interesting thought experiment: Why does the animation of a cylindrical shape, shown spinning the wrong way to be driven by the cogged wheel, show a misunderstanding of basic mechanics? Nevertheless, this was very clear and concise explanation, as well as definition illustrating the difference between centrifugal and centripetal force.

[@ihsanullah1224]

Sir why the object is not falling toward the center of circle ??? What stop it from falling????

[@ajinkyasanas2256]

From where does moon get its force perpendicular to Gravitation Force? BTW Amazing Video!!

[@nathangmail-user8860]

Gravitational force is perpendicular to the moon's velocity, as it would just move away without the gravity. Where did it get the initial velocity? that depends on how you believe the earth came to be, (e.g. I'm a young earth creationist, meaning I believe God created things the way they are, including but not limited to the initial velocity of the moon.) You might think that's dumb, but there is quite the substantial argument to be made that this is the case. Why doesn't the moon slow down? there is nearly no resistance in space, so the initial velocity is theoretically permanent ignoring very small or very slow changes like the decay of earth's gravitational field.

[@nayanmodak6124]

Best explanation

[@JeffChen285]

A distinct future of modern physics is that there are multiple explanations to the same phenomenon. By denying the existence of the centrifugal force, we are actually denying Newton's third law. According to Newton's third law, for every action force in nature, there is an equal and opposite reaction force. Here, the opposite reaction force is the centrifugal force, also called the inertia force. Thanks for D'Alembert, now I have two angles to look at a given dynamical phenomenon: 1 dynamically unbalanced view, and 2 dynamically balanced views. Interestingly, if Albert Enistein has treated the D'Alembert's inertia forces equally with the grqavitational forces, I believe that his happiest feeling for his equivalent principle will be disappeared largely.

[@snehasingh2746]

Wow nice concept 🙌💞

[@unnamedexodus3902]

Great video

[@MrDiaxus]

If I understand right, centrifugal "force" is actually the effect experienced by an object being acted upon by centripetal force. It's the physical response of wanting to continue on a straight path, while centripetal force continously forces it to alter direction. Is that accurate?

[@tarsofelix4414]

Pretty much, but keep in mind you will never observe them both at the same time. To sum it up: - If you're looking from the outside (inertial reference), you'll see a centripetal force acting, which is always a result of real forces. - If you look from the point of view of the rotating objects, you'll observe a centrifugal force, a pseudo-force, to compensate the fact that you're a non-inertial reference.

[@jitendradas3776]

Sir my doubt is ,for eg if we are in a merry go round,we feel pushed radially outside, the feel is real,and that push is due to centrifugal force,than how centrifugal force is pseudo force

[@anitaojotoro]

Would you like an answer to ease your doubts?

[@L7aleFajer]

استاذ مصطفى يا كبير

[@madizen6312]

Whirling dervish, sufi dance is a great example of this.

[@pomme4682]

Newton's first law of motion states that an object will remain at rest, or continue moving in a straight line at constant speed unless a force acts on it. On that basis, as the introductory video shows, for an object to move in a circle an inward force must act on it continuously. This is the centripetal force required to keep an object moving in a circle and must always be provided to do so. Such a force can be provided in many ways, such as the inward gravitational pull on the Moon by the Earth, the electrostatic inward force on electrons moving around a positive atomic nucleus. Similarly when an aeroplane wishes to change horizontal direction it needs to bank so that the component of lift provides an inward centripetal force for it to move in a circle. Likewise when a cyclist wishes to turn s/he must lean over so the reaction force between the tyre and road contributes to the inward centripetal force necessary. For this reason circular racing tracks are cambered to help provide this inward force on the cars. Hope this helps

[@SergeCeyral]

As french wrirer Paul Valery wrote once : "you had to be Isaac Newton to say that the Moon continually falls on the Earth, as anyone can see it doesn’t"!

[@jarrettknipp5147]

Centrifugal force is the reason mud flies off of tires. The faster the tire spins the more mud will come off the tire. Same thing happens when you spin a ketchup bottle that’s almost empty. Just more proof we’re setting still. Great video

[@kishorekumar-sm8hu]

The best of the Bestest

[@aarushirai6227]

3:07 the centrifugal force starts✌🏻

[@pragunsharma6367]

i have a doubt, at 5:41 in the video , you tell that the particle at the outermost radius requires more centripetal force but according to mv^2/r , as the distance increases , centripetal force should also decrease but if we modify the formula to mrw^2 then you point is not contradictory pls clarify as i always love to understand Concepts instead of learning them as formula/result.. Thank You Pragun Sharma

[@vangmountain]

There's a mistake in your understanding. Velocity is not constant. Water molecules increase in velocity as radius increases. All the molecules have the same period, T, meaning they all take the same amount of time to make one revolution. Since Fc = mv^2/r and we know V = 2*pi*r/T, then by substituting this in for V, we get Fc = m (2*pi*r/T)^2/r = (m*4*p^2*r^2/T^2) /r = 4*pi^2*m*r/T^2. With this equation, we see that Fc is directly related to r, so the further out you go, the greater the Fc. Hope this helps!

[@thisguy2549]

Isn't the casting barrel moving the wrong direction? Other then that thank you for the great video.

[@davejohn255]

9th grade science class. My science teacher's favorite subject.

[@vladtepes97]

I have never considered the surface of the spinning fluid to be curving, but, simply trying to move away from the centre, and being forced up the side of the container because it has nowhere else to go. As the particles move away from the centre and start climbing the walls of the container, naturally, there would be fewer particles in the middle, thus the surface of the fluid drops. What happens when you spin fluid in a bottomless cylinder in zero gravity?

[@SujitKumar-tr1kz]

His voice is so convincing, I said to myself "Now I know".

[@ianturley502]

The way you explain centripetal force makes it sound like someone has simply found a more clever sounding way of saying - "gravity"

[@Dekoherence-ii8pw]

No, not at all. It doesn't have to be gravity. In the case of a ball on a string, the centripetal force is the TENSION in the string. This, when analysed at the atomic level, is actually an electromagnetic force. (There are four fundamental forces - electromangetic, gravitational, strong nuclear, and weak nuclear.) Centripetal force is whatever force does the job in any particular instance of circular motion.

[@ianturley502]

@@Dekoherence-ii8pw oh, i think i get it, so like gravity or the string is what does the job of resisting the centrifugal force. and its effect is centripetal force. Right?

[@alexleibovici4834]

@@ianturley502 In order to make a body to rotate, you need a force. It can be gravity, it can be a string, the electrostatic force (ex. electrons around nucleus) etc. In this arrangement, all these are collectively called "centripetal", that is ones causing a body to rotate. A centripetal force is a generic name for any force which is used to make a body to rotate around another one.

[@CrazyCandyCrush]

Nice video

[@Sheim-b4k]

This really helped, thank you.

[@ericborlagdatan]

Informative explanation my new. friend

[@operationoverloard]

After watching about 10 seconds, I thought I was watching Romper Room. I did that about 53 years ago. That was enough back then....and only then. I wish I could get back at 10 seconds that I lost.

[@LetsLearn10th]

I wish that you could be my Physics Teacher😞