If the conditions are as you said, i.e. 'milky way is flowing towards a black hole', then the situation can be compared to a moving train. All the objects inside ( planets, stars, etc ) are moving towards the 'black hole' with the same velocity. Even though the object may seem to be at rest...
Thank you . You were right. I have mixed up between mass of objects and relativity mass. But can you tell me why we cannot accelerate an electron in a cyclotron?
I have seen at many places that if ever matter travels more faster than light, it's relativistic mass will reach nearly infinity. Some says it's the inertia, so very high energy is required to accelerate. But since it is traveling with the velocity above 3×10^8 m/s, i believe that the high...