A Train Travels Due South at 60 M/s

Multiple Choice

A train travels due south at 60 m/s. It reverses its direction and travels due north at 60 m/s. What is the change in velocity of the train?

A) 120 m/s, due north
B) 120 m/s, due south
C) 60 m/s, due north
D) 60 m/s, due south
E) zero m/s