About Energy

[Uvindu]

Does Energy depend on frames of reference?

 

[joigus]

17 minutes ago, Uvindu said:

Does Energy depend on frames of reference?

 

The short answer is yes. Energy in mechanics depends on position and velocity, and those are frame-dependent quantities.

I hope that answers your question. How satisfactory the answer is depends on how general you want it to be.

[SergUpstart]

2 hours ago, joigus said:

The short answer is yes. Energy in mechanics depends on position and velocity, and those are frame-dependent quantities.

I hope that answers your question. How satisfactory the answer is depends on how general you want it to be.

The energy of the individual bodies that make up the system can be different. But the total energy of all systems of bodies, depending on the chosen frame of reference, should not change.

[swansont]

17 minutes ago, SergUpstart said:

The energy of the individual bodies that make up the system can be different. But the total energy of all systems of bodies, depending on the chosen frame of reference, should not change.

The question was “Does Energy depend on frames of reference?” not whether it’s conserved within a frame of reference.

Yes, total energy depends on the reference frame.