I have came up some question asking the velocity change of the rocket in its instantaneous rest frame.(adsbygoogle = window.adsbygoogle || []).push({});

And I have been taught that in the instantaneous rest frame, v=0, dgamma/dt =0, gamma = 1. if v is always zero, how come to talk about the change in velocity?

Thanks in advance

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Instantaneous rest frame

**Physics Forums | Science Articles, Homework Help, Discussion**