Part 1: a 30 kg gun is standing on a frictionless surface. The gun fires a 49.8 g bullet with a muzzle velocity of 324 m/s. The positive direction is that of the bullet. Calculate the momentum of the bullet immediately after the gun was fired. Answer in units of kg•m/s.  Part 2: Calculate the momentum of the gun immediately after the gun was fired. Answer in units of kg•m/s.  Part 3: Calculate the kinetic energy of the bullet immediately after the gun was fired. Answer in units of J. Part 4: Calculate the kinetic energy of the gun immediately after the gun was fired. Answer in units of J.

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