A trains velocity is slowly decreasing as it approaches a station. About 1 km before it reaches the station several stowaways jump off the train. What happens to the amount of acceleration if the force remains constant? Assume the train is traveling in the positive direction.

Question

It will become less negative.
It will become more negative.
It will remain the same.
It will become more positive.

Answer 1

c. It will remain the same.
F = M*a.
a = F/M.

Answer 2

It will become less negative

It currently has a negative acceleration, since F = ma, if m gets smaller and F remains the same than a has to get bigger, this means that the acceleration increases in a positive direction. Since it was accelerating negatively, it will become less negative as compared to more positive.