Concept Simulation 2.3 offers a useful review of the concepts that lie at the heart of this problem. Two rockets are ying in the same direction and are side by side at the instant their retrorockets re. Rocket A has an initial velocity of +5300 m/s, while rocket B has an initial velocity of +9100 m/s. After a time 1' both rockets are again side by side, the displacement of each being zero. The acceleration of rocket A is -19 m/s2. What is the acceleration of rocket B? Number n Units V Two soccer players start from rest, 43 m apart. They run directly toward each other, both players accelerating. The first player's acceleration has a magnitude of 0.47 m/s2. The second player's acceleration has a magnitude of 0.44 m/s2. (a) How much time passes before the players collide? (b) At the instant they collide, how far has the first player run? (a) Number i Units (b) Number i Units V