A 5000-kg freight car collides with a 10,000-kg freight car at ...

[maychende]

A 5000-kg freight car collides with a 10,000-kg freight car at rest. They couple upon collision and move at 2 m/s. What was the initial speed of the 5000-kg car?
 
  A) 4 m/s
  B) 5 m/s
  C) 6 m/s
  D) 8 m/s
  E) none of the above

Question 2

A red car has a head-on collision with an approaching blue car with the same magnitude of momentum. A green car driving with the same momentum as the other cars collides with an enormously massive wall.
 
  Which of the three cars will experience the greatest impulse?
  A) red car
  B) blue car
  C) green car
  D) all the same

[GCabra]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: D

[maychende]

Gracias!

[kalskdjl1212]

Excellent