Motion is always compared to a reference point. If you and some friends are driving in a car at 60 mph from your reference point your friends do not appear to be moving, but if you are standing at the side of the road as the car goes by the passengers will appear to be moving at 60 mph.
A reference point
reference point
A landmark - or reference point.
That would be a reference point.
Motion it the change of an object over time relative to its reference point. that is called a reference point.
Introduction of motion
Introduction of motion
You have to use a reference point. Pick anything around the area (it's better if it's stationary), and then check to see if the other object changes position at all (in comparison to the reference point). If it does change position, then the object is in motion.
Earth's surface is a common reference point for detecting motion.
A Reference Point A reference point is needed to determine if an object is in motion.
A Reference Point A reference point is needed to determine if an object is in motion.
A Reference Point A reference point is needed to determine if an object is in motion.