Thread: Must be strangest topic yet

Is it true that if all the people in china jumped at the same time the earth would be knocked out of orbit???

no :|

lolno

my hypothesis.

I would say no as the gravitation force of the other planets play an important role in keeping the earth in its orbit. Now as the force that all the other planets / solar-bodies have on the earth is for example [x] N now all the people in china jump at the same time they have to overcome the forces of the other planets not by a small amount but a lot say for example [(1.5)x] N.

but if every person in china had one nuke and they detonate all of them at once the energy will (I am very sure) overcome that gravitation forces of the planets and knock earth out of orbit.

that will be an apocalypse as all life will be destroyed in massive natural disasters followed by the biggest crash into another planet

Let's analyse this:
Assuming there live 1.3 billion people (1.3*10^9 = 1,300,000,000) people in China.
First of all: Making all these people jump at the same time would be quite hard, but let's assume you let them jump off a thing that is 2m high and somehow you can make them jump at exactly the same time. I say you need about 0.5m * 0.5m space to land so you wont stamp on anybody's feet. 1.3*10^9 people * 0.25m^2 would be 325,000,000m^2 = 325km^2. Furthermore assuming the area they jump off has the same size you'd need 650km^2 to make these people jump at the same time. As China's total area is > 9,000,000km^2 that shouldn't be a problem.
Moreover, let's assume the average weight of a human is about 80kg. That would make a total mass of m = 80kg * 1.3 * 10^9 = 104 * 10^9kg = 104 Tg (teragrams).
The potential energy these people have is therefore: E = m * g * h = 104*10^9 kg * 9.81m/s^2 * 2m = 2,040,480,000,000 J = 2,04 TJ (sounds much but the nuclear bomb in Hiroshima had 52.3 TJ. We would need about 26 as much people as the Chinese inhabitans to be "just" as powerful as a little nuclear bomb.
Think that shows that there shouldn't be a signicfact or measurable result.

nice physics m8 LOL
Hiroshima's atom bomb did not even create a earthquake as far as I know and 50 TJ is well too much LOL so I am not sure of what the figures are to create an earthquake but the Chinese cant do it

wow cabry that is some physics sounded impossible anyway before cabry proved it l,olol

The earth "weighs" about six septillion kilograms. That is more than a trillion times the weight of all the people on earth.
the earth would move less than one trillionth as far in the opposite direction
so if they jumped 2m (estimated) they would move the earth 2x10^-12m

SUNS ESCAPE VELOCITY = 617000ms-1 (Speed needed to escape the orbit of the sun.)
Earths speed in suns orbit = 29000ms-1

now to estimate the acceration for the earth to move this distance assume the time taken for it to move 2x10^-12m is the same as the time it takes for the fall time of the Chinese man (sorry miss simple physics has no space for women [my physic teachers words ] )

time of falltime for man =


D=2m
time= ?
A=9.81 Gravity
initial velocity = v1 = 0ms-1

D =v1x[time] +0.5at^2
2m = 0 x [time] + 0.5 x 9.81 x t^2
2m = 4.905 x t^2
2/4.905 = t^2

square root t = 0.638

so the acceleration needed to produce that would be 921630.09ms-2

now the force that would produce using cabrys mass estimates M= 104TG
F=MA
104 000 000 000KG x 921630 ms-2 = 9.8X10^16N (this being with the earths resistive forces being negligible)


98 000 000 000 000 000 Newtons of force
98TN Tera Newton of force

Little Boy, the atomic bomb that was dropped on Hiroshima, had a force of 300,000 newtons

98000000000000000N this calculation
300000N = Hiroshima


\\i had to do this completely hypothetical way while neglecting many important factors since cabry done it his way\\



but as soon as all the Chinese men jump, they will begin falling back toward the earth but what people dont know is the earth falls back toward them and the net effect is infinitely close to zero

also the collision of the earth into hydrogen atoms would exceed the amount created by people jumping

also much more massive objects (massive = greater mass) with more mass than all the humans on earth these objects are...Metoers which travels at speeds much greater than anything our planet can provide pulling us towards it and were still in orbit so theres physical theory and logical proof

sorry if i made a few too many errors and my logic made no sense but i didnt have a single book infront of me while proposing my theory and + my calculations i think wouldnt fit this example but under my hypothetical way ie.(// statement //) its all true and phyically correct

According to different sources the bomb had a TNT equivalent of 12,5 kilo tons TNT. So 1 kT TNT is about 4184 gigajoules = 4.184 terajoules. This times 12,5 is roughly ~50TJ. Just to explain how I got that value. I'm not sure whether my calculations are free of mistakes (I wrote them in my lunch break after a stressy day) and even if they were right I also neglected many things such as ignoring friction, the fact they do not land on the same spot, earth's rotation...
I think murf also tried an interesting way, although I'm not sure about your value for the nuclear bomb explosion as 300kN appears to be a bit too little. Anyways, both ways have proved that the effect would be ~0.