A train that is 268.7 m long undergoes constant acceleration the moment the
last car (end of the train) is outside of the station, how far is the front of the
train from the station after 25.0 s if its initial speed before acceleration is
4.48 m/s and its final speed is 27.4 meters per second?
A 667 m
B 678 m
C 399 m
D 663 m

Answer(b) 60 miles per hour;

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction