If you jump up high does the spinning Earth's momentum keep you in a geosynchronous location..

[MrScorpio]

Or will the Earth rotate under your feet?

[JitterbugPerfume]

1. I dunno BUT

I love the way your brain works!

[Xithras]

2. Yes, if you can jump up 26,199 miles at a speed of 11.2 km/s

Short of that, you're just gonna fall on your rump.

[Aristus]

3. No. Even while suspended in mid-air during the jump, we're still moving at the same

relative speed as the Earth.

[unpossibles]

4. right. The analogy I've seen is throwing a ball inside an airplane

The ball won't go faster if you throw it toward the rear of the plane.

EDIT:
on further reflection, I decided that my subject line sounds dirty. IBTL!

[Ikonoklast]

8. What does the Mile High Club have to do with the question?

Some people, I swear...

[Bucky]

9. Re-read the OP.

You have to jump up and down because those damn airline toilets don't give you room for horizontal maneuvers.

[jobycom]

5. Yes to one of those, no to the other.

There's probably a web site explaining it, with diagrams and formulae.

If I had to guess, I'd say that probably the Earth spins beneath you, while at the same time much of that effect is countered by the movement of the atmosphere with the earth, and the effects of inertia, since you are already moving at the same speed as the Earth, so the net effect is closer to a geosynchronous stasis than to a geodislocation, but that any vectoral calculation isolating either factor (geosynchonosity or inertial dislocation) would be an imperfect predicter if one could measure to that fine a calibration. If that makes sense.

But that's a guess. I'm a liberal arts major.

[armyowalgreens]

17. That actually does make a lot of sense...

You are not literally disconnecting yourself from the rotation of the planet. You are still inside the atmosphere which is travelling just as fast as the earth. So that would likely push you forward.

But I am also a liberal arts major.

[petronius]

6. With two exceptions, you will come down farther to the west than where you started,

assuming that you jump high enough and there is no effect from the atmosphere...

[Orsino]

7. Can't you *feel* it turn under your feet?

Or is there not enough Earth, Wind & Fire in your playlist?

[Bucky]

10. Sadly, no. What happens is that, with your weight removed, the earth weighs slightly less...

so while you hang there in mid air, the earth actually slightly accelerates in speed (corresponding to how much weight your jumping up has lightened the load by) and you therefor fly backwards by as much as 0.3 millimeters. This has all been proven... by science!

[HopeHoops]

11. Only if you are wearing new sneakers!

They make you run faster too!

[NightWatcher]

12. I think it'd be cool if everyone could jump up at the exact same time

and see if we could bounce this big ball a few times.

A question of you:
If everyone on Earth lost 20 pounds, would the Earth spin any faster because of a lighter load?

[charlie and algernon]

15. everyone jumping would cancel everyone out

the effects of people jumping in North America would be offset by the people jumping on the opposite side of of the planet

[Orrex]

18. What if we all coordinated it so that we jumped in sequence a la "The Wave?"

[HiFructosePronSyrup]

13. No, but your own inertia does.

[Orrex]

19. Excellent.

[armyowalgreens]

14. You are already travelling at such a high rate of speed ( somewhere around 16,000 mph IIRC)...

That your deceleration would be negligible. Theoretically, the earth should rotate ever so slightly. But it's probably an immeasurable amount.

[NJmaverick]

16. Consider this thought experiment

your question is based on the idea that breaking free of the earth causes the earth to move in relationship to yourself. Well what happens when you put a puck on an air hockey table? If the table is perfectly level and the air cushion perfectly uniform, the puck will remain motionless. This despite the fact that the puck has freed itself from a connection to the earth in the same matter has your high jumper.