Impact Parameter

(A) The trajectory traced by an incident particle depends on the impact parameter of collision (R) The impact parameter is the perpendicular distance of the initial velocity vector of the incident particle from the centre of the target nucleus

(A) the trajetory traced by an incident particle depends on the impact parameter of collision. (R) the impact parameter is the perpendicular distance of the initial velocity vector of the incident particle from the centre of the target nucleus.

A disk A of radious r moving on perfectly smooth surface at a speed v undergoes an elastic collision with an identical stationary disk B. Find the velocity of the disk B after collision if the impact parameter is r//2 as shown in the figure :-