A 0.16 kg pool ball sliding to the right at 8.0 m/s has an elastic head-on collision with another 0.16 kg pool ball initially at rest. If the first ball stops after the collision, what is the velocity of the second pool ball after the collision?

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?