A particle or mass m is moving with speed u in a direction in a which makes 60^(@) with respect to x axis to x axis . It undergoes elastic collision with the well . What is the change in momentum in x and y direction?

A particle or mass m is moving with speed u in a direction in a which

1.	A particle or mass m is moving with speed u in a direction in a which makes 60^(@) with respect to x axis to x axis . It undergoes elastic collision with the well . What is the change in momentum in x and y direction?
Answer» `Deltap_(X)`=-MU ,`Deltap_(y)`=0 `Deltap_(x)`=-2mu, `Deltap_(y)`=0 `Deltap_(x)`=0,`Deltap_(y)`==mu,`Deltap_(y)`=0 `Deltap_(x)`=mu,`Deltap_(y)`=0 Solution :The change in momentum of the moleculein x direction `Deltap_(x)`=FINAL momentum - collision =-mu-mu=-2mu The change in momentum of the molecule in Y direction `Deltap_(y)=0`