[Crispy]

http://www.worldjumpday.org/

[army20]

I don't belive this

[Carmon]

lol wacky idea wonder wat Uni got the payments for that idea lol but sounds like a laff lol

[XtremeMaC]

lol i'll jump from the roof
f=ma

[SiMoNsAyS]

i've read a long time ago something similar about what would happen if all the people living on china jumped...

i'll set my alarm to jump at 12:39:13 pm, 121.092.679 people will do it

[Carmon]

me and my g/f gunna do it lol but best not get too many ppl jummpin or we lose course

[KJxp]

I'll do it! Couldn't hurt could it?

[Lost Soul]

lol jump jump

[KJxp]

I've got a question here about the validity, though. I asked my older brother and he agreed too: When you jump, you and the earth push each other (though the earth doesn't move very far). As soon as you reach the height of your jump, the earth and you pull each other back (though, again, the earth not very far). So, by hitting the ground again, you reverse all the movement and energy spent pushing the earth.

Imagine the common example in high school science textbooks: two people on rollerblades. Expecting 600,000,000 million people to move the earth's orbit is like saying that if I push another rollerblader, he'll move, and I won't. We'll both move in proportion to our mass. If we pull each other back, we will end up on the same spot on the road.

I have another idea, but I'll see what everybody's opinion to this is first.

[XtremeMaC]

dude don't stress it that much, just jump when u're prompted

action = reaction

[KJxp]

Quote

just jump when u're prompted

I'll jump, but I still want to know why

[XtremeMaC]

man its all relativity, a forum would not be enought to explain it, one could explain it verbally but that'd still be long.

i dunno how old u are but if u're in high school +/- u'll learn more about it in the univ...
i'm taking dynamics right now, it consists of lots of relative stuff not really relativity in depth but still..

first thing to keep in mind is earth already rotates and mass of earth's ratio to ppl's mass, i'd say ppl's mass is considerably low. so don't expect too much of an orbit change, but it'll be fun to watch ppl jump

its just another occasion to have fun after all. i hope ppl won't kill each other after no orbit change

[KJxp]

I'm 17.

Quote

but it'll be fun to watch ppl jump. its just another occasion to have fun after all. i hope ppl won't kill each other after no orbit change

I completely agree!

[HyperHacker]

Watch this, a bunch of places will sink.

[EchoNoise]

haha... the sky really will fall

[Skitso]

If enough people jump....can this cause a tsunami??

[Skitso]

....wouldn't like that....!

[Zxian]

Man... some people really need to get things into perspective.

600,000,000 people * 80kg/person (yes, they're all fat people)
= 4.8 x 10^10 kg


Mass of earth = 5.98 x 10^24 kg

We're not gonna make a change here people...lmao....

[cypher_soundz]

the tsunami made a change , it speed up the earth rotation by a fraction, read news pages like /. etc. who knows but im still gonig to jump
Regards
cyph

[EchoNoise]

In theory... Wouldn't the change in orbit, the earth will collide with the moon...