Answer:
The momentum would be doubled
Explanation:
The magnitude of the momentum of the freight train is given by:

where
m is the mass of the train
v is its speed
In this problem, we have that the speed of the train is unchanged, while the mass of the train is doubled:

therefore, the new momentum is

so, the momentum has also doubled.
Well that depends...what is your question?
La D mijo es blanco por que al pasar con rapides el color se torna blanco
<span>A.frictional effects dissipate energy.</span>