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A red stunt car of mass 800 kg moves at 25 m/s east. A green stunt...

A red stunt car of mass 800 kg moves at 25 m/s east. A green stunt car of mass 1200 kg moves at 15 m/s west. In a movie stunt, the car’s collide and stick together.

  1.    What is the initial momentum of each car?
  2.    What is the initial total momentum of the system?
  3.    What is the total momentum of the system after the collision?
  4.    What is the velocity of the cars immediately after the collision?
  5.    Is this an elastic, inelastic, or perfectly inelastic collision? How can you know (without calculating kinetic energy)?
  6.    Now find the initial and final kinetic energies of the system. Was your answer to part (e) correct?
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