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Part A: A machine gun fires 55.8 g bullets at a speed of 750 m/s. The...

Part A: A machine gun fires 55.8 g bullets at a speed of 750 m/s. The gun fires 182 bullets/min. What is the average force the shooter must exert to keep the gun from moving? Answer in units of N.

Part B: What is the momentum of a two-particle system composed of a 1000 kg car moving east at 50 m/s and a second 1000 kg car moving west at 85 m/s? Let east be the positive direction. Answer in units of kg · m/s.

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