Problem 11 An object of mass mi = 300 gram slides to the right with the speed of vii = 2 m/s on a frictionless surface and collides with another object of mass m2 = 400 gram (figure below, left). The collision is purely elastic and happens at x = 0. The second object then slides for a = 70 cm before hitting the wall, bouncing back with no loss of speed (figure on the right). Find position on the x axis d where the second object will catch up with the first object. V2 V2f Vif Vli M2 M2 MI m2 m1 X a