Conservation of momentum and energy :D Wats this question on bout? 1. [HRW6 10.P.026.] In Fig. 10-32a, a 4.00 g bullet is fired horizontally at two blocks at rest on a frictionless tabletop. The bullet passes through the first block, with mass 1.20 kg, and embeds itself in the second, with mass 1.80 kg. Speeds of 0.630 m/s and 1.40 m/s, respectively, are thereby given to the blocks (Fig. 10-32b). Neglect the mass removed from the first block by the bullet. (a) Find the speed of the bullet immediately after it emerges from the first block. (b) Find the bullet's original speed.