Where does energy come from to slow a pulsar's rotation in an accelerating spaceship?

[Ross Arden]

If a pulsar with a period of exactly 1 second was put in a spaceship and accelerated up to V where would the energy come from to slow the rotation of the pulsar ?

 

[sweet springs]

Pulsar remains the same period in the rocket system. No addition or deletion of energy. Lorentz transformation and addition/deletion of energy are different things.

 

[Dale]

If a pulsar with a period of exactly 1 second was put in a spaceship and accelerated up to V where would the energy come from to slow the rotation of the pulsar ?

What is the formula for the kinetic energy of a relativistically rotating and translating object?

 

[Nugatory]

If a pulsar with a period of exactly 1 second was put in a spaceship and accelerated up to V where would the energy come from to slow the rotation of the pulsar ?

No energy is needed to slow the rotation of the pulsar, because it doesn't slow down the way you're thinking.

You will have to tell us more about how your experiment works, because two really quite different things are often described as "moving clocks slow down". Are you planning to send the pulsar out on a round trip: the spaceship accelerates away, turns around and comes back, when it's back we ask a crew member how many times it rotated during the trip? Or will the ship carrying the pulsar keep on flying away while the crew member radios back periodic status reports: "The pulsar has rotated X times since my last report?"

The former is the twin paradox; the latter is time dilation. No energy is needed to change the rotational speed of the pulsar in either case, but the explanation of why is different.

 

[Ross Arden]

I would like to discontinue this thread

 

[PeterDonis]

I would like to discontinue this thread

Thread closed at OP's request.