The Coriolis Force
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- Опубліковано 28 вер 2006
- The Force which is exerted on mass due to rotation of the Earth. Neat stuff to dispel the myth that water runs away one way in the Northern Hemisphere and the opposite way in the Southern Hemisphere!
- Навчання та стиль
it was that great "All Ghillied Up" mission from COD4 that made me research this
very good. It´s astonishing to realize the movement from another frame.
Hold up a straight edge (piece of paper) to the path of the ball and keep replaying the part where one releases the ball (hover over the progress bar and click repeatedly). The edge of the ball should follow the edge of the paper. Any perception otherwise is merely your mind playing tricks on you.
I want to see someone flush a toilet on a merry-go-round...
Thanks a lot - was waiting for this.
in short: don't. Video games don't calculate the coriolis force into the trajectaries of objects. Though irl you should know what direction you're shooting in. If you're shooting to the east or west, there's no effect. If you're shooting to the north the bullet will appear to bend to the left, to the south it will appear to bend to the right. So if your target is north of you, aim right of his head. If he's south of you, aim left of his head. Be aware the effect is small over small distances.
Looks curved both ways to me.
because you're watching it in relation to the kids on the merry go round. You're interpreting the intentions of the kid throwing the ball and seeing the ball doesn't follow the path the kid intended for it to follow. If you edited the video and you erased everything but the ball you'd only see the ball moving on a straight line to the right at 0:02 and straight (ish) upwards at 0:05 . The experiment in the video isn't perfect though because there is friction between the ball and the merry go round making the ball pick "some effect" as it starts moving.
Bullshit dude; you failed to look past your nose. Even though we have been showed two interpretations of events and the one straight line interpretation appears to be slightly curved: this is because you have not looked at the third possibility when the argument was deceptively posed using only two possibilities, when in actuality there are three. The curvature seen by the stationary observer might be seen as a sort of reciprocal mirror image depending whether the ball is tossed with a vector agreeing with the rotation or against it. There should be three possible viewpoints and not just two.
Thats what she said
Thank you! I get it now, and I totally remember feeling this in my childhood merry-go-round days.
At 4 secs in, the person in the red lets go of the ball at 6 o' clock and at 5 secs in, the person in green catches it at 12 o' clock. So, even though it may not seem straight, it is.
This video quality is top notch I must say
Thanks!! this is the best video for Coriolis effect.Pls don't be misunderstood by those other videos.
Good experiment, well-explained.
It is, your mind is automatically tracking the rotation of the merry go round and using it as a point of reference.
Try focusing on the shadows next to the merry go round and tracking the path of the ball with your peripheral vision.
Short and sweet
It's real in that it has an effect on everything since we live within a rotating point of reference (the rotating earth).
Thanks bro straight to the point
very cool
Learned this in Astronomy class lmao
i'm in science class right now and that call of duty comment had me laughing out loud. good job dude
Genius!
Interesting information, I shall now spin a circle until I drop and then eat mac n cheese. Thank you
Coriolis effect will also be big over small distances at very low speeds.
So a snail going in a straight line from Paris to Lyons will eventually end up in Dijon
صراحه احلى ڤيديو عن تاثير كوريوليس
Muito bom....tentei entender com livros, mas não deu.....o vídeo de vocês me salvou!
@rowanbooker I was thinking of a very slippery snail. (obviously)
And I could make the very same complaint about your aircraft, since it's attacherd to the air that it flies through, and it doesn't at all float freely in space.
Well imaging an airplane that has to go from LA to London, if the pilot don't considered the coriolis effect he might ended up in another place because London "move" from its original place related to the time it was when the airplane leaves LA.
Sniper rounds will not appear to fly in a straight line from the shooter to the target because of the rotation of the Earth on its axis. Rather, the round or shell will appear to curve. But this effect only is appreciable in distance longer than 2000m
You are saying it is the same effect in the woods, when you end up walking in circle, instead of straight line as it appears in mind..
thats so fly!
You're in the northern hemisphere in CoD4 and therefore the bullet will go to the left. In the southern hemisphere, it's opposite.
DOn't even know how i found this video.
Don't mind me. Just a regular 2020 comment passing through.
Its straight from above because the ball is on the surface so its moving with the merry go round. If the ball was in the air the merry go round would move but the ball would go straight
Like others, I also researched this because I wanted to know what McMillan was trying to tell me in the sniping COD4 mission.
Now after watching this video I have one question directed at anyone who knows how to answer it: how does the coriolis force affect the path of a bullet and where do you have to aim to undo its effect?
i've seen this video 29 times now and i still don't understand it!
Diff question. It's not a force...
It stands loose of gravity and air and w/e. But it is not a real force, the ppl on the wheel are just in an accelerating frame of reverence (thus a non-inertial one). That means the laws of newton don't apply there. The force is just an operator you apply to all objects in order to acheive an inertial frame of reference, thus getting a system where the laws of newton are valid, but strange things appear to happen.
+Necron3211 According to the calculation I made (but I had to make lots of approximations, which are good, but make me more skeptical about the final number, btu not on the order of magnetude of the number), the effect had between 1.5 and 0.5 cm (depending mostly on the firearm used and on the direction of the shot), so it could be very significant if you were trying to shoot the neck (~10cm) with only one shot. Other factors are more important than that at distances between, say 500m and 1500m - as far as I can tell nobody really did anything beyond, say 3000m shot killing the target - but an error of the order of centimeters can be quite bad in such situations.
To the dude that posted the video. It is called the Coriolis EFFECT not force. There is nooooo force here
i think mcmillan was implying that rotation of the earth itself will affect your bullet's course at that distance. thats all i can really gather from this lol
Oh damn this shit is poppin'.
@Evolve451 But since all motion is relative to the observer, there is an element of "illusion" to it.
dang it no one gave me a ball all those times i was on a merry-go-round. after watching this video, i guarantee my kids will have no such misfortune!
Put something on coriolis effect in ballistics
To see that the ball is moving in a straight line (from above), only focus on the ball and the background, do not pay attention to the people on the merry go round or the merry go round itself.
The coriolis "force" affect the bullet because the bullet is moving in a rotating surface, remember that the earth is rotating and in the case of a sniper, the bullet has to travel a long distance that is the reason the sniper has to considered the coriolis "force" and so do airplanes when travel long distances. Sorry for my english xD
it's not that the ball appears straight while above the merry-go-round but that the destination toward which the kid pushed the ball is achieved at the end of the spin or standing still
This was 12 years ago lol but your comment helped me a lot. I didn't think the ball’s path appeared straight from above; your way of phrasing it made a lot more sense to me.
oh i think i get it now! the paths are always the same.. they just look different at a different perspective!
No problem its not bad I've heard worse ^^
Thanks for the info thats why then. But if I'm aiming at Al Asads head in COD, how do I make sure I am taking the coriolis force into account?
does th force work without gravity or air?
In One Shot, One Kill in Call of Duty 4, when you had to snipe the guy from a distance, he said to take the Coriolis Effect into account :) Dunno if it actually did anything but I still blew his arm off.
@PawelKolasa of course the coriolis effect exists,many people experience it in their daily life there are so many damn examples about it and normal troops dont really have to take it into account as their main purpose is to fire at medium ranges so the bullett isnt really affected same thing happens with the cannons but sniper shots taken from loooong distances have a shiload of things which can affect the bullet one of them is the coriolis force
Gravity is another fictitious force that acts on a body in a non-inertial frame of reference (like the Coriolis force).
The best way you can "see" a pure force is when there is only that force that is acting on a body. So the Coriolis force would be more predictable if there wasn't air drag and friction (friction is due to gravity).
But be careful because fictitious force do not always obey the Newton's 3rd law (read about quantum mechanics).
It's a fictious force, so both terms are legit.
Eum no, this video isn't confusing at all. Watch the guy in yellow passing the ball. The ball follows a perfect straight line from 0:03 to 0:04. Watch it again, because you missed it.
THis already is a demonstration of Coriolis on ballistics.. just replace ball with bullet........
Also there's no real point in caring about the coriolis effect if for instance, you were a sniper.. since it isn't noticable inside of a distance of about 1000 yards.
this video is confusing..try watching another one because the ball seems to curve when ur watching from above...
Josh? Is dat you?
Who else is in Mrs. Mainard class rn
no. the path does not appear straight to the observer above.
wind has no effect, this would happen in a vacuum...
Skibidi toilet
me too lol.
@rowanbooker ???
ach. I still don't get it.
@brunoistheonetruegod I doubt it.
?????????
@BeforeShock makes no sense, sorry
IF Coriolis force is real, woulnd't the artillery soldiers to account for it?
Myth has it, but does the REALITY?
HOW exactly is it implemented in a CANON?
I don't think so.
Now, Coriolis force is just PERCEPTION of an OBSERVER and therefore is NOT a real force at all, but a PERCEPTION of a trajectory.
And it's a perception of CENTRIFUGAL FORCE.
Again, Coriolis force doesn't exist, it's a PERCEPTION of a TRAJECTORY.
I'm the first to blow a whistle on this one.
Obit
pause it from the top view. It's curved. so what did it prove?
+chasferr Put your hands over and below the ball in the first attempt, you will see it's a straight line
+chasferr It appears curved, but the ball doesnt deviate from its original direction as it does from a first person perspective
Invalid test, need to redo test do the same thing but inside some kind of bubble! The air and everything inside a bubble will be equal (air inside would be still from air outside) and be valid for testing coriolis force. Spinning without a bubble the air is moving invalid for testing. I would love to see this test re done!
do you mean ball touches the surface but air wouldn't in case...??
The drag force is negligible compared to the Coriolis force here. It doesn't matter, although you're right, ideally the carousel should be enclosed in some sort of canopy for this test.
Then fucking explain it to me because I go to Northern Illinois University and I had 2 atmospheric classes that said the same shit. I even copied that from a lecture powerpoint slide.
Lol
does not compute
so, how do you explain the countless tests that have been done with shooting objects such as BB's and cannonballs from their respective equipment, where the BB/cannonball is shown to rise and fall often directly back into the barrel?
"Gravity magically glues the entirety of the atmosphere to the surface of the rotating Earth such that the Coriolis effect cannot be detected"
ok, so the coriolis effect CANT be detected then?
"No, it can, just only when it's convenient for the argument to avoid being blatantly shown as false"
Talk to a sniper. They account for Coriolis.
the whole physical concept of inertial vs non inertial frame of reference is fucked and fundamentally flawed.
Sorry, fictitious.