You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide toward the front of the train.From this observation,you can conclude that this train is not an inertial reference frame because it is slowing down.

Question

Quizplus · Accepted Answer

According to Newton's First Law, an object at rest or in motion will continue in that state unless acted upon by an external force. Therefore, if the luggage is observed to be moving from a stationary or slowing position towards the front of the train, it can be concluded that the train is not an inertial reference frame since there must be some external force acting on the luggage to cause it to move in the opposite direction, which is towards the front of the train.

You Are in a Train Traveling on a Horizontal Track