Wormhole Problem: Limit of Acceleration?

[ericsaul]

Hello every one, some days ago, i was talking with some friends and we found a weird trouble that we can't explain so i wanted to ask it cause the curiosity its killing me... well the trouble its this:

Suppose you are standing in the surface of a planet without atmosphere and you open a wormhole with entrance and exit one above the other like this

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then you throw an object in 90 degrees so it will fall for ever like this

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the question its, it will fall accelerating indefinitely? and if so, from were its getting so much energy? or in the other case which would be the limit of acceleration?

 

[ericsaul]

by the way, i know the energy will came from the gravitational potential energy, but since the energy can not be created from where comes that energy? cause its like an a infinite falling, so its an a infinite source of energy that can accelerate to relativistic velocities adding eternally more energy each time, then it would create some source of a perpetual motion machine if you extract the energy to feed the wormhole, and that's the thing since the perpetual motion machine its impossible, where its the limit?