is mass changes according to quantum physics

Question

a rest object has rest mass m₀  

but for the same object the moving mass is m

Answer 1

m = γm₀ where γ = (1 - v²/c²)^-1/2 is the relation you are looking for.

 

 

The modern interpretation is the momentum, p, is affected by speeds close to c and not mass itself.  The mass is just rest mass, m₀.

 

p = γm₀v