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27 November, 00:23

The muzzle velocity of a 50.0 g shell leaving a 3.00 kg rifle is 400. m/s. What is

the recoil velocity of the rifle?

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Answers (1)
  1. 27 November, 02:21
    0
    -6.67 m/s

    Explanation:

    Momentum before = momentum after

    m₁ u₁ + m₂ u₂ = m₁ v₁ + m₂ v₂

    (0.0500 kg) (0 m/s) + (3.00 kg) (0 m/s) = (0.0500 kg) (400. m/s) + (3.00 kg) v

    0 kg m/s = 20 kg m/s + (3.00 kg) v

    v = - 6.67 m/s
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