In the figure below, block 1 of mass m1 slides along an x axis on a frictionless floor with a speed of v1i = 2.40 m/s. Then it undergoes a one-dimensional elastic collision with stationary block 2 of mass m2 = 0.200m1. Next, block 2 undergoes a one-dimensional elastic collision with stationary block 3 of mass m3 = 0.200m2.