yes, you guessed it, world jump day is nearly upon us, only 3 weeks and 21 hours to go.
all you lucky folk in the western hemisphere get to jump, while us over here have to stand very still and see if we feel a big thud. i HIGHLY doubt that world jump day will actually work, but if it does, cool.
who here is taking part in world jump day?
your doubts are founded. here’s a back-of-the-envelope estimate of the effect of world jump day… i’ve padded up my figures for dramatic effect.
let’s say 3 billion people jump, and each person weighs 90 kg (~198 lbs). let’s compare the mass of the jumpers to that of the earth:
(3 billion * (90 kg)) / (1 earth mass) = 4.52 × 10^-14
to put that number in perspective, the mass of an insect compared to that of a car is about 1.0 × 10^-6. that’s 100 million times greater! do you feel a jolt in your car when a bug hits the windshield? it’s going a bit faster than the average jumper, as well…
it’d be better if it were “world jump off a bridge day”… that way we’d be rid of the idiots who believe such a thing would have any effect…
Not to mention setting it up where everyone’s jump is actually coordinated to happen at the same time. Getting everyone within a second would be difficult. Getting everyone to hit at the same instant will be extra-difficult. Only the real geeks will probably hit it on time.
In other words, the effect will be more like a whole bunch of tiny bug parts hitting the windshield of your cruise ship within a few seconds of each other.
it’s not about the world-jolting aspect, it’s about the happy faces of jumping children worldwide
i figure
when the people jump up they are pushing down on the earth to propel themselves away from it, which moves the earth a bit the other direction, but the whole time they are in the air the earth is pulling them back down again so its applying pressure to earth back in the direction it came from, then when the people hit the earth again it evens out the pressures.
so i cant see it working, although it is a nifty idea
you’re one of those creationists, aren’t you? scientologist? 'cause your post is full of pseudo-science…
sweet world jump day is on my birthday 
i also highly dout wjd wil work but it will be interesting to see what effect if any it has on the orbit
Ouch!