If something hit the front of the train, at best, it would have slowed it down a bit, not accelerated it.
question is was the train going over 100mph or was it not....
the engineer's ONLY job is to control the speed, am I right?....there is no steering...
what could have possibly prevented the engineer from slowing the train down when he should have...and btw...a slowing down process takes a short while to do it...why wasn't the slowing process started well before the curve?
A VERY little bit if you consider the weight ratio of a small projectile to a train.