The ratio of masses of two balls is 2 1 and before collision the ratio of their velocities is 1 : 2 in mutually opposite direction. After collision each ball moves in an opposite direction to its initial direction. If e= ratio of speed of each ball before and after collision would be (2m)..... m U=U 5 (1). 6 5 (a) times (b) Equal (c) Not related 6 (d) Double for the first ball and half for the second ball U = 2u Before collision (2m) V After collision the 11 V