The reference point should be stationary, or not moving.
Earth's surface is a common reference point for detecting motion.
A landmark - or reference point.
This is called a reference point.
A change in an objects position relative to a reference point is called motion.
Stationary
Yes, movement can be measured in reference to something assumed to be fixed in place. This is known as relative motion, where the movement of an object is determined by comparing it to another object or reference point that is considered stationary.
A reference point helps to explain why we are, where we are.
What is the fixed reference point in the photos?
Its position, relative to the point of reference.
If your reference point it moving, then it cannot be considered a reference point. Your reference point should be something constant. Something that can be relative to any situation. If it moves, you lose this relativity.
Without a fixed Point of Reference, there is nothing to be relative to.
It is like asking why you are building structures on earth.Similarly you want potential with respect to earth.Alternative_Answer">Alternative AnswerIt's simply an agreed convention.The electrical potential at any given point is always measured with respect to another point (e.g. +100 V, with respect to... ). That other point can be anywhere and, as the 'reference point', it is considered to be at zero volts relative to itself. In most electrical engineering applications, the reference point is assumed to be earth.
No because enable to see if the object is moving it needs a reference point other than itself.
a good reference point is a very large tree when driving on a road
When you want to compare something or measure something, in order to make the comparison you have to know and agree where you are starting from. The point at which you are starting is your "reference point"
To support you in specifying how the reference point is placed and how the object is moved away from the reference point.