# Probably a stupid question

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#1
i'm feeling a bit lazy to think this through, so can someone clarify this for me:

When you jump in a train you don't get flung to the back of the train because you have the same velocity as the train, so everything is fine.

But what about on earth? Now the earth is slightly curved obviously. So when you jump up you go to a greater radius and thus require a greater velocity to stay in alignment with the position you jumped from on earth. But obviously you dont have any extra velocity and so shouldn you move back slightly?

My question is essentially: When you jump up from standing on the ground, do you move ever so slightly backwards against the Earth's rotation? (obviously it wont be measurable, but should you theoretically move back)?
0
15 years ago
#2
Maybe the gravitational pull of the Earth is greater than the energy of the Earth's movement.
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#3
does the gravity accelerate us tangentionally?
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15 years ago
#4
(Original post by Willa)
does the gravity accelerate us tangentionally?
yes, to the centre of mass wich is not necessarily the centre of the earth
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15 years ago
#5
(Original post by Willa)
My question is essentially: When you jump up from standing on the ground, do you move ever so slightly backwards against the Earth's rotation? (obviously it wont be measurable, but should you theoretically move back)?
Yes, you should be moved slightly out of position. The Coriolis Effect is actually noticeable.
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