No you don't, because it takes work (the application of energy) to lift the ball in the first place. The work done in lifting the ball is exactly the same as the GPE that gets converted into KE in the first place.
Not always!!!
It depends on the approach you are using.
I will proove you wrong.
Let us discuss my that another idea on gravity engine.
For example,If there is a 1 kg of solid powder to be lifted upwards,I need X amount of work done upwards.If I have to push 2 Kg of solid powder downwards,I need to consume X plus X (2X)amount of Gravitational energy.
Net energy consumed = 2 X -X =X
Which is then converted to Net electrical energy Output.This is what one of the way of satisfacting the Principle,
Mostly real Gravity engines should work on the principle that the Gravity engine/Gravity wheel systems are innovatively designed to take in (consume) much more Gravitational energy than what energy needed to lift heavy ball upward.
Now notice that this cannot be achieved when such a overcommable resistance gradient occurs only with respect to time vertically.In other words,you need your system to be in a cyclic circular path OR in other words the gradient should occur in a continuous circular cyclic path.
I have developed a mechanism to achieve this cyclic process but it's a secret until It is published in official gazette.Actual engine will not use powder ok:::this is just an analogy.
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Let's talk of Principle of minimum Potential energy and Creep.
Again I will proove you wrong!
I guess you know what is meant by creep and Body force(self weight).
I guess you know what is stress(resistance to deformation),atomic dislocation and strain.
Note that creep,self weight,stress are not new things which I am proposing,and are foundations of structural engineering.
Refer rough analogous sketch on
http://www.flickr.com/photos/59145126@N07/6927929850/
The splashing of water resistance (overcomming of water resistance)is quiet similar to the Overcomming of cantilever beam resistance by the central weight loading.The machenism of failure of two column supported beam(Simply supported beam) works similarly.Let weight W be loaded at centre.The overcomeability of a good beam should be less at initial stage.Initially there will be allmost an equal and opposite reaction from the beam for the weight loading,with little energy spent for deformation.Slowly ATOMIC Dislocation takes place(slippage of atomic planes/slippage of grain boundaries)and a point reaches where stress become unbearable(stress is resistance to deformation).As the stress become unbearable,there will be minimum equal and opposite reaction for the weight loading and then the most amount of continuous gravitational energy will be used to overcome this beam resistance/stress and finally the beam breaks.This is analogous to what happens in my engine with the exception of the speed at which all this happens.This is what I learnt in Material Science subject.No good material science Professor in machenical engineering would deny this.
The speed of this similar process is actually relatively fast,occurs in extended nanoseconds time in my engine whereas in beams it is very low speed [It occurs in beams due to mainly Creep
http://en.wikipedia.org/wiki/Creep_(deformation) ]
So my engine does not go against laws of physics.In fact what I have told here about mechanism of Creep due to stress becoming unbearable is the backbone of structural engineering and the first question for an interview could be "how beams fail under self weight load and external weight load."My technology does not bend physics but uses it in a altogether different way.
Defination of analogy:The word analogy can also refer to the relation between the source and the target themselves.
Actual engine details will be out once it is published in official Gazzete on International patent office website.it is really a simple concept.
The idea behind the overcommable resistance is to extend time spent by gravity to act on a heavy object/ball by a few nanoseconds due to the slowing down of the heavy ball speed due to resistance offered.The more the time gravity acts at a particular height(H=H1),the more the gravity energy gained to overcome resistance (splashing the water resistance in analogous example given) as well to rotate the half cycle generator rotor.
Note that in the sketch example,water resistance only acts in downward direction and do not act in uoward direction.
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The mechanism of creep depends on temperature and stress created due to weight loading on a structural member(many times,the weight loading is only self weight). The various methods are:
Bulk diffusion (Nabarro-Herring creep)
Climb — here the strain is actually accomplished by climb(
http://en.wikipedia.org/wiki/Dislocation#Dislocation_climb)
Climb-assisted glide — here the climb is an enabling mechanism, allowing dislocations to get around obstacles
Grain boundary diffusion (Coble creep)(
http://en.wikipedia.org/wiki/Coble_creep)
Thermally activated glide — e.g., via cross-slip
Just a note so that you do not confuse: Phenomeneon similar to Creep and "not creep" occurs in the actual engine.