Interaction Energy how does it transform between inertial frames?

[Abu Abdallah]

Energy is not an invariant quantity between different frames of reference. For example a particle having a kinetic energy in one frame has a zero kinetic energy in another frame. But what about interaction energy? If I know the interaction energy between 2 particles in one frame, how can I calculate that energy in another one?

 

[Ich]

What is an interaction energy?

 

[pmb_phy]

Energy is not an invariant quantity between different frames of reference. For example a particle having a kinetic energy in one frame has a zero kinetic energy in another frame. But what about interaction energy? If I know the interaction energy between 2 particles in one frame, how can I calculate that energy in another one?

By using the stress-energy-momentum tensor. If we're speaking classically then one must not allow the particle to be a point particle since then you run into infinite energy.

What is an interaction energy?

The mutual potential energy between to objects is a good example.

Pete

 

[bernhard.rothenstein]

interaction energy

Energy is not an invariant quantity between different frames of reference. For example a particle having a kinetic energy in one frame has a zero kinetic energy in another frame. But what about interaction energy? If I know the interaction energy between 2 particles in one frame, how can I calculate that energy in another one?

Probably the paper
T. Plakhotnik "Explicit derivation of the relativistic mass-energy relation for internal kinetic and potential energies of a composite system," Eur.J.Phys. 27, 1-5 2006
could be usefull.