Apparent creation of energy

In summary, the question concerns the apparent creation of energy when a large rock is brought into the proximity of a star, gaining kinetic energy and losing gravitational potential energy. The origin of this energy is questioned, as no work was done to raise the object above the star. The concept of gravitational potential energy is discussed, and it is suggested that all objects in the universe may have gravitational potential energy with respect to each other. The conservation of total energy is also mentioned as a factor in this phenomenon. However, it is noted that potential energy does not exist physically, but rather represents the potential for energy that a mass may acquire.
  • #1
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My Question has to do with the apparent creation of energy;

Say if one were to some how find a large rock in deep space (where no other gravitational fields existed) and bring it into the proximity of a large mass, say a star, It would be safe to say that it would accelerate towards this star, gaining KE and losing GPE.

The question lies here; where did this energy come from? As no work was done to raise the object above the star where did the GPE come from?

Does GPE exist when an object is far from the reaches for the Grav field?
On this line of reasoning can we say that all objects in the universe have GPE with respect to every other body?
 
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  • #2
Total energy does not change. The rock had potential energy proportional to it's original distance from the star. Moving the rock closer to the star decreases its potential energy and so increases its kinetic energy.
 
  • #3
mtong said:
My Question has to do with the apparent creation of energy;

Say if one were to some how find a large rock in deep space (where no other gravitational fields existed) and bring it into the proximity of a large mass, say a star, It would be safe to say that it would accelerate towards this star, gaining KE and losing GPE.

The question lies here; where did this energy come from? As no work was done to raise the object above the star where did the GPE come from?

Does GPE exist when an object is far from the reaches for the Grav field?
On this line of reasoning can we say that all objects in the universe have GPE with respect to every other body?

Here's more on how to work with conservation of total energy
https://www.physicsforums.com/showthread.php?t=72040

marlon
 
  • #4
The Potencial Energy does not exist physically, as the name says it is the potencial of energy that a mass will acquire. Anyway, a mass never reaches its maximum kinetic energy since it hits the surface of the attracting mass first and cannot make it to the center.
 

1. How is energy created?

Energy cannot be created or destroyed, according to the Law of Conservation of Energy. It can only be converted from one form to another.

2. What is apparent creation of energy?

Apparent creation of energy refers to situations where it may seem like energy is being created, but in reality, it is being converted from one form to another. This can be due to incomplete understanding or measurement errors.

3. Can energy be created from nothing?

No, energy cannot be created from nothing. This goes against the Law of Conservation of Energy, which states that energy is always conserved.

4. Is apparent creation of energy possible?

Apparent creation of energy is not possible. It may seem like energy is being created, but it is actually being converted from one form to another. This can be due to human error or limitations in our understanding of energy.

5. How can we distinguish between true creation of energy and apparent creation of energy?

In order to distinguish between true creation of energy and apparent creation of energy, we must carefully examine the situation and consider all factors. We must also ensure that our measurements and understanding of energy are accurate and consistent.

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