Answer:
Train wheels and rails are both made of steel, and the steel-steel friction coefficient is around 0.25. As a result, the stopping time and distance will be three to four times that of a car.
Yes. Newton's laws do not apply at the subatomic level. There you are entering the weird world of Quantum Theory. Go read about the '2 holes experiment'. It will blow your mind.
A) experimental because he isn’t sure and is testing out
The size (distance) is the same the direction is opposite so one displacement is 180 degrees different to the other.
<span>C) Both rocks strike the water at the same time.</span>