1 7. A 3.5 g bullet is fired horizontally at two blocks at rest on a table. The bullet passes through block 1 (m = 1.20 kg) and embeds itself in block 2 (m2 = 1.80 kg). The blocks end up with speeds v = 1.40 ms. Find the speed of the bullet as it enters block 1 and as it leaves block 1. 0.630 m/s and V = 2