2. Suppose you have a one-dimensional collision with rnl 450 g and m2 400. g. The initial velocities are given to be 2.3 m/s, V2i 1.1 m/s Vli and the final velocity of rn2 is V2f 1.2 m/s. What is the final velocity of mi? 3. Is the collision in problem 2 elastic? You can determine this by calculating the initial and final total kinetic energies and seeing if they are the same, or by calculating the coefficient of restitution and seeing if it is equal to 1.