# Tag Info

### Thought experiment: Where does potential energy come from if matter is created from energy?

There are many things wrong with this question. Unfortunately, the only way to answer it is to correct the problems: Assume that I have a slightly magic machine that can create any amount of matter ...

### Work done in raising an object to a height

(N.B- Boldface characters represent vectors, italicized characters represent scalars or vector magnitudes) I would like to address this query from a mathematical point of view, just to deeply clarify ...
1 vote

### Inquiry Regarding Hypothetical Celestial Mechanics Scenario

It will depend a lot on the mass of the second sun and the eccentricity of the orbit of the planet. Quick and dirty approximate solution would be that for most of the planets in our solar system (in ...
1 vote
Accepted

### Is a satellite revolving in Earth's orbit also affected by the gravity of the Sun or other planets?

Is a satellite revolving in Earth's orbit also affected by the gravity of the sun or other planets ? Yes it is. For a satellite in a low Earth orbit, the largest effect will be the Earth's gravity, ...
1 vote
Accepted

### Work done in raising an object to a height

The solution is all about which system you are considering. I prefer this version of the work-energy theorem for mechanical systems: $$W_\text{net,ext} = \Delta K + \Delta U$$ The subscripts on the ...
1 vote

### Work done in raising an object to a height

Work is the transfer of energy from one energy-holding abstract object to another. If A gives B 5 joules, B gives A -5 joules. We don't sum them to find out how much was transferred; they're two ways ...
1 vote

### Work done in raising an object to a height

When we raise an object to a height $h$, it is said that the potential energy of the object is increased by $mgh$. Although we commonly say that, it is not technically correct. We have increased the ...
1 vote

### Thought experiment: Where does potential energy come from if matter is created from energy?

I think the OP could basically be describing a Kugelblitz$^†$ formed by light rays coming from nearly all directions, focused on the point in question, which is a physical scenario. My attempt at ...

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