Final-Answer:
A. Position can be used to describe the train by giving its location relative to a reference point. For example, we could say that the train is at the station, or that it is halfway between the station and the next stop.
B. Motion is the change in position of an object over time. We can measure motion by tracking the object's position at different times. For example, we could measure the position of the train every minute and plot the results on a graph.
C. Changes in motion can be described by looking at the object's speed and acceleration. Speed is the rate at which an object changes its position. Acceleration is the rate at which an object's speed changes. We can measure speed and acceleration by tracking the object's position and velocity over time.
For example:we could measure the position of the train every minute and calculate its speed and acceleration. We could then plot the results on a graph to see how the train's speed and acceleration change over time.
