I have a question, why when you recorded the impulse, you wrote -2kmv_0\cos{\alpha}
Above The Main Solution I have also Provided a Different Problem and its solution for Better Understanding.
(VoCosA) is the velocity component of the Falling particle perpendicular to the Incline which will lead to existence of an Impulsive Normal Reaction which would lead to form an impulsive Friction (which is the direction which we consider Negative)
Yeah i understood that, but my question is why you put 2 before -mvcosA
Oh .
That’s Because the Masses stick . So (2m) .