I want to figure out the forces on M2 w.r.t M1. I say, there is
3- Pseudo force as M1 is accelerating.
Now,suppose a body is moving with an acceleration a and i want to apply Newton’s laws on B wrt A. I say that the body B is accelerating with an acceleration -a, even if it’s stationary ( wrt earth of course ). This is how we apply pseudo force. M1 is accelerating with v^2/r1.
Now, when i apply this acceleration on M2 as a pseudo force, i get the wrong answer, but if i apply a pseudo force on M2, but by taking the radius r2, i get the right answer. That is, If i apply a pseudo force on M2 = mv^2/r1 ( r1 because i am applying it w.r.t M1 ) i get the wrong answer. But if i apply a force mv^2/r2 on M2, i get the right answer! Why is this happening?