A 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.20 kg) and embeds itself in block 2 (mass 1.80 kg). The blocks end up with speeds v1 = 0.630 m/s and v2 = 1.40 m/s. Neglecting the material removed form block 1 by the bullet,
Find the speed of the bullet as it:
(A) leaves and
(B) enters block 1.