Arailroad diesel engine coasting at 1.2 m/s runs into a stationary flatcar that has a mass of 1000 kg. the diesel weighs 5 times as much as the flatcar. assuming the cars couple together, how fast are they moving after the collision? what type of collision is this?

V = 0.2 m/s

Explanation:

given,                                        

speed of the diesel engine = 1.2 m/s

mass of car = 1000 Kg                      

using conservation of momentum

m₁v₁ + m₂v₂ = (m₁ + m₂ ) V                  

v₂ = 0 for stationary flatcar

1.2  m₂ =  (5 m₂ + m₂ )V                          

1.2  m₂ =  (6 m₂ )V                      

V = 0.2 m/s                                                            

hence, the velocity moving after collision is equal to 0.2 m/s

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