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"Relativistic Mass" thought exercise with approaching bodies
I understand that the concept of 'relativistic mass' is somewhat controversial, but for reasons that are unclear to me. Nevertheless, I humbly pose the following thought exercise/inquiry:
For starters, I understand the formula for 'relativistic mass' to be:
M=m0(1 - v2/c2)-1/2
Knowing that there is no such thing as a 'resting' inertial frame, I understand the above equation to be a calculation of the mass of an object moving at velocity v relative to another frame.
My thought exercise is as follows:
I am sitting in a spacecraft that is parked 10 meters away and parallel to a conveniently placed length of massless red yarn that extends in a straight line ahead and behind my location for a distance of several light years. As I am parked in this location, I notice an identical craft in the distance approaching my direction in a path parallel to the yarn and 10 meters on the other side of it at a velocity of say: c*(1-10-10). I know from the relativistic equation above that the approaching craft has tremendous mass and due to its proportional gravitational attraction, I will surely accelerate across the yarn to collide with it. The occupant of the oncoming craft perceives that he is parked and that I am approaching at the velocity stated.
My question is this: Which craft will accelerate across the yarn to collide with the other? If the other craft should drift toward me, I will be perplexed that this massive object would change course as a result of the gravitational force of my relatively tiny mass. The occupant of the other craft would be equally puzzled if I were to accelerate in his direction across the yarn.
Many thanks for your thoughts...
I understand that the concept of 'relativistic mass' is somewhat controversial, but for reasons that are unclear to me. Nevertheless, I humbly pose the following thought exercise/inquiry:
For starters, I understand the formula for 'relativistic mass' to be:
M=m0(1 - v2/c2)-1/2
Knowing that there is no such thing as a 'resting' inertial frame, I understand the above equation to be a calculation of the mass of an object moving at velocity v relative to another frame.
My thought exercise is as follows:
I am sitting in a spacecraft that is parked 10 meters away and parallel to a conveniently placed length of massless red yarn that extends in a straight line ahead and behind my location for a distance of several light years. As I am parked in this location, I notice an identical craft in the distance approaching my direction in a path parallel to the yarn and 10 meters on the other side of it at a velocity of say: c*(1-10-10). I know from the relativistic equation above that the approaching craft has tremendous mass and due to its proportional gravitational attraction, I will surely accelerate across the yarn to collide with it. The occupant of the oncoming craft perceives that he is parked and that I am approaching at the velocity stated.
My question is this: Which craft will accelerate across the yarn to collide with the other? If the other craft should drift toward me, I will be perplexed that this massive object would change course as a result of the gravitational force of my relatively tiny mass. The occupant of the other craft would be equally puzzled if I were to accelerate in his direction across the yarn.
Many thanks for your thoughts...