Yes we’re considering Newtonian mechanics in any case. What I’m especially curious about is what physical principles people use to motivate their answers.
Comment on A little physics riddle
xylogx@lemmy.world 5 weeks ago
The new coordinate system is moving one meter per second in the x-direction. This is small enough compared to the speed of light that we can ignore relativity. So the mass is the same and the velocity and momentum just get shifted by one meter per second, no?
pglpm@lemmy.ca 5 weeks ago
pglpm@lemmy.ca 5 weeks ago
Regarding the third body, consider the case where its mass is, say, 2 kg, and the case where it’s 1 kg instead (the momentum being the same).