Final answer:
To determine if an object is in motion, you need to look at its displacement and velocity. Two examples are driving a car and observing a moving train from inside. These examples show that an object is moving when there is a change in its position relative to a reference point.
Step-by-step explanation:
In order to determine if an object is in motion, you need to look at its displacement and velocity. If the object is changing its position with respect to a reference point, then it is in motion. Here are two examples:
If you're driving a car in a straight line and you pass by a fixed landmark, you can see that the distance between you and the landmark is changing. This indicates that you are in motion.
In another example, if you're sitting in a moving train and you observe a tree outside the window, if the tree appears to be getting closer or farther away, it means that you and the train are in motion.These examples demonstrate that an object is in motion when there is a change in its position relative to a reference point.