Answer:
Increases
Explanation:
From Newton's second law:
F = ma
If F stays the same and m decreases, then a increases.
Therefore, the magnitude of the train's acceleration increases (the acceleration becomes more negative).
First convert 90km/hr to m/s.
Initiate velocity = 0m/s (car was at rest)
Final velocity is 25m/s (90km/hr converted)
25m/s - 0m/s / 8s = 3.125 m/s^s
Therefore the answer is option A (3.13m/s^2)
