Two balls roll to the right. Both have a mass of 2.3 kg. The ball in front (the one on the right) has a speed of 3.0 m s . The ball in the back (the one on the left) has a speed of 4.0 m s . They collide and bounce off each other. After the collision, the ball in back has a speed of 1.1 m s . What is the speed of the front ball after the collision? v r f = m s Round your answer to the nearest hundredth if necessary.