i want to believe..!!!!. . i want to believe !!!!
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> hey anon, wanna give your opinion?
asd
#6 - gtaant
Reply +215 123456789123345869
(09/15/2012) [-]
User avatar #11 to #6 - finishhimlarry
Reply +20 123456789123345869
(09/15/2012) [-]
*insert obligatory "YEEEEEEEEEEEEEEEAAAAAAAAHHHHHH" picture here*
#13 to #11 - rambochicken
Reply +20 123456789123345869
(09/15/2012) [-]
:)
User avatar #88 to #11 - Akwardweirdo
Reply +5 123456789123345869
(09/16/2012) [-]
#137 to #88 - terracottapie
Reply 0 123456789123345869
(09/16/2012) [-]
made my night, thank you
#111 - gratrunka
Reply +100 123456789123345869
(09/16/2012) [-]
Okay, lets get some Math up in this bitch

The formula for Centripetal Acceleration, the speed the train needs to be at the top of the circle, is A=Speed2 / Radius of the circle.

Okay, so since the diameter of the circle is roughly the length of the train, and the train has 4 carriages, then it's Train Carriage x 4. Now, the average train carriage is 75 foot long, so thats 75ft x 4, which is 300ft. Diameter of Circle is 300ft, so radius is 150ft. Have our radius in feet. Since the sum is in Meters, we convert it to 45.72 meters. Theres our radius

We know that A at the pinnacle of the circle is 9.81 m/s2 so thats settled.


To Find the speed necessary to do the loop de loop, we have to mess with the equation a bit.

a= V2 / R
V2 = A x R
V = Square Root (AxR)
Now just add in the numbers

V = SR (9.81 m/s x 45.72)
I'll skipp the calculations and just tell you that the answer is 21.178 meters be second.
Convert that into Kilometers per hour =

63.53 kilometers per hour. So this **** is possible.

Let's call Mythbusters
User avatar #118 to #111 - snarfalupticus
Reply 0 123456789123345869
(09/16/2012) [-]
its from a french commercial.
User avatar #120 to #111 - WakaTakaBang
Reply 0 123456789123345869
(09/16/2012) [-]
Why would you think that the centripetal acceleration at the pinnacle is 9.81 m/s2?
User avatar #125 to #120 - kaelanduck
Reply +1 123456789123345869
(09/16/2012) [-]
It has to be at least that or gravity will have it's way
User avatar #252 to #125 - WakaTakaBang
Reply 0 123456789123345869
(09/16/2012) [-]
I know why it has to be at least it, but why does it have to be? Isn't it possible it could be going faster?
User avatar #127 to #120 - annogram
Reply 0 123456789123345869
(09/16/2012) [-]
It has to be at least 9.81ms^-1 otherwise it'll it wont move in a vertical circle on earth! it's a minimum btw it can be a lot higher and probably is cuz energy is wasted
#142 to #111 - anon id: f35f9fa0
Reply 0 123456789123345869
(09/16/2012) [-]
In theory, yes. But in the real world, you would need to take into account that there would be friction and you would need to also take into account momentum and loss of energy.
User avatar #143 to #111 - screwyouman
Reply 0 123456789123345869
(09/16/2012) [-]
Science up in this bitch!
User avatar #155 to #111 - ifiwereayoungman
Reply 0 123456789123345869
(09/16/2012) [-]
Did you take mass into account in that equation? I'm sure that would make a bit of a difference.
#170 to #111 - anon id: afecc40e
Reply 0 123456789123345869
(09/16/2012) [-]
You forgot to take into account the fact that this is not uniform circular motion. The train will loose its kinetic energy as it climbs the loop.

Also, your method of estimating the radius of the circle is very poor. In the gif, it did not show the length of the train compared to the loop, therefore for all we know, the train could be much longer or much shorter than the diameter of the loop.
User avatar #196 to #111 - OminousDemon
Reply 0 123456789123345869
(09/16/2012) [-]
i feel like it would need to be faster than 40mph :|
User avatar #197 to #111 - buttinspecter
Reply 0 123456789123345869
(09/16/2012) [-]
Wow. I just got done with my first engineering physics course. I didn't think I'd find a valid application so soon. Well, see you guys. I'm gonna go live the rest of my life without finding a single other application.

Seriously, I probably won't.
#265 to #111 - penguinthegreat
Reply 0 123456789123345869
(09/16/2012) [-]
but there is a problem
the construction would fall apart
#122 to #111 - steavo
Reply +3 123456789123345869
(09/16/2012) [-]
...you forgot the part where it has to be secured onto the rails.
#113 to #111 - conorpadraic
Reply +8 123456789123345869
(09/16/2012) [-]
I liked that, but I think the loop would have needed to be larger. The angle it goes up looks more like a ride at the fair. Too sharp for something that is held together by hitches.

Need a bigger loop to lower to the slope, mang.
User avatar #134 to #113 - malevolentspoon
Reply +1 123456789123345869
(09/16/2012) [-]
Also to make sure the tops of the train cars don't get crunched together like soda cans while they're being pushed up against each other.
#136 to #111 - metajunky
Reply +30 123456789123345869
(09/16/2012) [-]
you forgot to carry the wumbo
#117 to #111 - mvtjets
Reply +68 123456789123345869
(09/16/2012) [-]
#4 - djequalizee
Reply +56 123456789123345869
(09/15/2012) [-]
#282 to #4 - krunoking
Reply 0 123456789123345869
(09/16/2012) [-]
I was looking at your comment for 5 minutes and waited for train to hit him
i'm not a clever man
#291 to #282 - djequalizee
Reply +1 123456789123345869
(09/16/2012) [-]
Here, use this instead next time ;D
#5 to #4 - gladiator
Reply +10 123456789123345869
(09/15/2012) [-]
nice, thats nice
#212 - zonryu
Reply +43 123456789123345869
(09/16/2012) [-]
**zonryu rolled a random image posted in comment #15 at 2 Hamsters 1 Wheel ** MFW
#220 to #212 - dyllygaf
Reply +21 123456789123345869
(09/16/2012) [-]
How appropriate
How appropriate
#230 to #220 - koalafication
Reply +13 123456789123345869
(09/16/2012) [-]
Comment Picture
User avatar #221 to #220 - zonryu
Reply +4 123456789123345869
(09/16/2012) [-]
IKR?!
#8 - bakinboy
Reply +33 123456789123345869
(09/15/2012) [-]
Comment Picture
User avatar #18 to #8 - drastronomy
Reply +2 123456789123345869
(09/15/2012) [-]
Actually, math can find out.
#138 to #18 - ariachnotred
Reply -3 123456789123345869
(09/16/2012) [-]
See comment 111, will c/p for ease
Okay, lets get some Math up in this bitch

The formula for Centripetal Acceleration, the speed the train needs to be at the top of the circle, is A=Speed2 / Radius of the circle.

Okay, so since the diameter of the circle is roughly the length of the train, and the train has 4 carriages, then it's Train Carriage x 4. Now, the average train carriage is 75 foot long, so thats 75ft x 4, which is 300ft. Diameter of Circle is 300ft, so radius is 150ft. Have our radius in feet. Since the sum is in Meters, we convert it to 45.72 meters. Theres our radius

We know that A at the pinnacle of the circle is 9.81 m/s2 so thats settled.


To Find the speed necessary to do the loop de loop, we have to mess with the equation a bit.

a= V2 / R
V2 = A x R
V = Square Root (AxR)
Now just add in the numbers

V = SR (9.81 m/s x 45.72)
I'll skipp the calculations and just tell you that the answer is 21.178 meters be second.
Convert that into Kilometers per hour =
63.53 kilometers per hour. So this **** is possible.
Let's call Mythbusters
User avatar #228 to #138 - drastronomy
Reply -1 123456789123345869
(09/16/2012) [-]
*slow clap*

I am assuming it is correct. Too lazy to check it.
#288 to #228 - ariachnotred
Reply 0 123456789123345869
(09/16/2012) [-]
Yay, four red thumbs haha
Funnyjunk logic at its finest

#49 - jonashuelsman
Reply +21 123456789123345869
(09/16/2012) [-]
sometimes i masturbate with hotdogs
User avatar #51 to #49 - zenodc
Reply +6 123456789123345869
(09/16/2012) [-]
I know, right? Don't you just love hotdogs?
User avatar #87 to #51 - DrSalvador
Reply +5 123456789123345869
(09/16/2012) [-]
Sometimes I put hotdogs in my anus
#121 to #87 - threenewmessages
Reply +2 123456789123345869
(09/16/2012) [-]
I'm sweating like a homo holding some... hotdogs
#9 - ninjacowboy
Reply +21 123456789123345869
(09/15/2012) [-]
Comment Picture
#99 - raffinrox
Reply +20 123456789123345869
(09/16/2012) [-]
User avatar #7 - celestiasbeard
Reply +14 123456789123345869
(09/15/2012) [-]
"Sir won't that mess up our schedule for a while?"
"Do I look like I'm currently giving a ****?"
#10 to #7 - rzkruspe
Reply +5 123456789123345869
(09/15/2012) [-]
#124 - bigsaltyballs
Reply +13 123456789123345869
(09/16/2012) [-]
F40PH thread?
#129 to #124 - anon id: 28d41c2c
Reply 0 123456789123345869
(09/16/2012) [-]
No.
#144 to #129 - bigsaltyballs
Reply 0 123456789123345869
(09/16/2012) [-]
#201 to #124 - itsmewaffle
Reply 0 123456789123345869
(09/16/2012) [-]
yeeeeeeeeeeeee