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"In billiards, the cue ball has a mass of .17 kg and the other balls have masses of .16 kg. The cue ball, traveling at 2.9 m/s, strikes the 9-ball, which is at rest. After this collision, the cue ball continues at 0.5 m/s. What is the velocity of the 9-ball after the collision?"

Provide the magnitude of the velocity of the 9-ball after the collision (number only).

Respuesta :

Answer:

2.55 m/s

Explanation:

Conservatiopn of momentum       (momentum = mv )

  the momentum before = momentum after

           .17(2.9) = .17(.5) + .16 v

                  v = 2.55 m/s

     

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