One: You cant use newton’s laws to handle relativistic phenomena. And two, if your leg has a mass of 2kg, 1.1×10^10 J of kinetic energy would require your leg to be moving at about 150 km/second not faster than the speed of light.
launch him anyway
Submitted 1 year ago by fossilesque@mander.xyz to science_memes@mander.xyz
https://mander.xyz/pictrs/image/d7961040-0f35-4e6b-b7f0-acf24d58e2e5.jpeg
Comments
xkforce@lemmy.world 1 year ago
wahming@monyet.cc 1 year ago
Pretty sure you’re generating twice as much energy as needed, the required speed is only about 106km/s
dQw4w9WgXcQ@lemm.ee 1 year ago
Besides, if you really needed those kinds of speed, you’d obviously have to calculate with relativistic formulas. Energy is asymptotical at the speed of light.
BigBenis@lemmy.world 1 year ago
Not to mention the fusion reaction triggered by a FTL foot connecting with said child’s backside would annihilate both parent and child immediately.
sharkfucker420@lemmy.ml 1 year ago
Thats inefficient, you dont need to cancel the angular momentum as there was no time limit on how long it takes rhe child to enter the sun and there also was not a specified required trajectory. The child can just spiral into the sun
Faust@feddit.de 1 year ago
There are no spiral orbits. Canceling the forward motion is exactly what you need to do, to bring down the next periapsis to 0. Now, you can go with a periapsis of about half a million km, because the sun is pretty big, but that is not a significant difference. Getting anywhere near the sun, is the hard part.
milicent_bystandr@lemm.ee 1 year ago
Right, I wanted to ask: is that actually the minimum energy to make the child reach the sun? What’s the minimum energy to launch something so it reaches the sun?
KISSmyOS@feddit.de 1 year ago
The minimum would be something like punting your kid to the orbit of Venus for a gravity assist that takes it to one of the outer planets where another gravity assist can push it to the edge of the solar system.
Out there, the angular momentum of the orbiting child will be very low and can be canceled out by a small thrust.
The child will then fall back into the sun. But this requires remote controlled thrusters strapped to the child. And a life support system if you want your child to actually die by burning in the sun. And then, the child will be well into their teens by the time they reach it.
Turun@feddit.de 1 year ago
Right, and what force is acting on the child to make it deviate from a circular orbit into a spiral one?
EddoWagt@feddit.nl 1 year ago
You could use a gravity assist from another planet
Cutecity@hexbear.net 1 year ago
I don’t think you can achieve a spiral orbit in an area with so little friction, mostly devoid of dust and gas, else the earth would be on one of those too…
PotatoesFall@discuss.tchncs.de 1 year ago
Okay the math is obviously wrong, and it’s not even answering the question.
The question was, how much force. If punting the kid involves a kick, let’s say the foot makes contact with the kid for about 25 cm. Then the force required over this distance is on average 45 GN.
This is equivalent to the child experiencing roughly 180,000,000 G
Sentient@sh.itjust.works 1 year ago
Faster than the speed of light.
Lol that is some shit maths for a checks note astrophysicist i am shit at maths and even i know its wrong.
JustAnotherRando@lemmy.world 1 year ago
Are you arguing that 1.12 billion m/s is NOT faster than the speed of light, or are you arguing that the speed required by the kick is not 1.12 billion m/s? Because if it’s the former, the speed of light in a vacuum is 300 million m/s (to 3 significant figures), or less than one third of that kick speed. If you’re arguing the latter, I don’t feel like checking all of the calculations this early in the morning.
Kaput@lemmy.world 1 year ago
The reliable way to get an answer from the internet is to provide the wrong answer, then someone will come and correct you, providing the answer you seek. (Xkcd, probably maybe?)
meyotch@slrpnk.net 1 year ago
This is a proven fact. Expose yourself early and often, that’s my motto.
ignirtoq@fedia.io 1 year ago
Cut the extra inch off the long side to get a 4" square, then cut the remaining 1" x 4" piece into 4 1" squares. The boy never said the squares had to be the same size.
If the triangles have already been cut, it's a peanut butter sandwich: use peanut butter on the edges to glue it back together and cut the squares. The child gave you a challenge, think outside the box!
FuglyDuck@lemmy.world 1 year ago
starman2112@sh.itjust.works 1 year ago
If the triangles have already been cut, the kid gets a brand new sandwich fully intact, crust and all, and a knife. Let’s see you cut this sandwich better than I can brayxtyn
KISSmyOS@feddit.de 1 year ago
If that’s the child’s name, you have no one to blame but yourself, and are probably underqualified for handling a butter knife.
ulterno@lemmy.kde.social 1 year ago
Parent’s already thinking outside the biosphere.
lugal@sopuli.xyz 1 year ago
Or just get another child. I know they don’t grow on trees but I’m sure they grow somewhere
psycho_driver@lemmy.world 1 year ago
The fiery pits of hell
Sabre363@sh.itjust.works 1 year ago
That not a nice name for the uterus
HiddenLayer5@lemmy.ml 1 year ago
“Then you’ll be fired.”
“Fine!”
“Out of a canon into the sun.”
nifty@lemmy.world 1 year ago
Do. It.
Kolanaki@yiffit.net 1 year ago
Why does it have to be a kick? Could I generate that force with a car?
Bishma@discuss.tchncs.de 1 year ago
Surely they’re not so mad that they need to kick their child into the sun. I’m sure a low solar orbit would suffice.
AtmaJnana@lemmy.world 1 year ago
Always funny to see the memes show up here a week after I get sent them from friends who still use Facebook and Fark.
fossilesque@mander.xyz 1 year ago
The circle of memes
siderealyear@lemmy.world 1 year ago
I think I scared my wife and kid I laughed so hard.
Anticorp@lemmy.world 1 year ago
Then how does Superman throw people into the sun? I think this mathematician needs to read a few comic books.
Omega_Haxors@lemmy.ml 1 year ago
It’s your own damn fault for not asking first what they wanted.
Evilsandwichman@hexbear.net 1 year ago
Can’t they use a ladder?
strawberry@kbin.run 1 year ago
or
heavier foot
tape + brick
Jerkface@lemmy.world 1 year ago
I wanted a least squares solution, but all I got were these right triangles!
Iron_Lynx@lemmy.world 1 year ago
What if you could kick him into space, making an orbital transfer to Jupiter, from which the kid gets a gravity assist that bounces the kid into a more elliptical orbit that then sends him into the sun?
JusticeForPorygon@lemmy.world 1 year ago
I was really hoping he was going to convert the amount of energy needed into calories, then from calories into peanuts butter sandwiches
psycho_driver@lemmy.world 1 year ago
1 calorie is interchangeable for approximately 4.1868 joules. Therefore, assuming his math was correct (many say it was not), I’m coming up with 2,687,016,337 calories needed. According to google, sourcing from the USDA, your average peanut butter sandwich has 384 calories. Therefore you’d be expending approximately 6,997,438 peanut butter sandwiches worth of energy to punt the ungrateful little shit into the sun.
wanderer@lemmy.world 1 year ago
In the US, the calorie used in nutrition data is actually a kilo calorie.
cyberic@discuss.tchncs.de 1 year ago
384 cal or 384 kcal per sandwich?
Pandoras_Can_Opener@mander.xyz 1 year ago
Same.