You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide directly toward the front of the train. From this observation, you can conclude that this train is
A) slowing down and changing direction.
B) changing direction.
C) speeding up and changing direction.
D) slowing down.
E) speeding up.

Question

Quizplus · Accepted Answer

When a piece of luggage slides toward the front of the train, it indicates that the train is decelerating or slowing down. This is because the luggage, due to inertia, tries to maintain its state of motion while the train's speed decreases.

You Are in a Train Traveling on a Horizontal Track