Three identical discs A,B and C rest on a smooth horizonal plane as shown in figure -40151. The disc A is set in motion with velocity b along the perpendicular bisector of the line BC joining the centres of the stationary discs. The distance BC joining the cnetes of the stationary disck B and C is n times the diameter of each disc. At what value of n will the disc A recoil, Stop, and move on after elastic collision. ?

Three identical discs A,B and C rest on a smooth horizonal plane as sh

1.	Three identical discs A,B and C rest on a smooth horizonal plane as shown in figure -40151. The disc A is set in motion with velocity b along the perpendicular bisector of the line BC joining the centres of the stationary discs. The distance BC joining the cnetes of the stationary disck B and C is n times the diameter of each disc. At what value of n will the disc A recoil, Stop, and move on after elastic collision. ?
Answer» ANSWER :`"["nltsqrt2,n=sqrt2,ngtsqrt2"]"`