That's right, motion cannot be measured unless you have some frame of reference within which to measure it.
It certainly is necessary. Sometimes it may be implied - for example, in practice, quite often planet Earth is used as a frame of reference. But whether it is implied, or explicitly stated, you always need a frame of reference to describe motion, or position.
An origin or zero point.
Motion is relative. There must be something to compare it to.
:p hi
Motion is always relative, depending on the reference point. If a tree is the reference point, then the car zooming past will be moving. But, if you use the car as the reference point, then it seems as though the tree is zooming past.
It certainly is necessary. Sometimes it may be implied - for example, in practice, quite often planet Earth is used as a frame of reference. But whether it is implied, or explicitly stated, you always need a frame of reference to describe motion, or position.
frame of reference
An origin or zero point.
Motion is relative. There must be something to compare it to.
Speed and direction of motion.
:p hi
Motion is always relative, depending on the reference point. If a tree is the reference point, then the car zooming past will be moving. But, if you use the car as the reference point, then it seems as though the tree is zooming past.
It is called "reference frame"; and yes, that's the basic idea - related to what will you measure movement.
It is called "reference frame"; and yes, that's the basic idea - related to what will you measure movement.
One point of view from which to describe motion is the observer's frame of reference. This point of view defines the position and motion of an object relative to the observer. By choosing a specific frame of reference, we can describe how an object moves in relation to that reference point.
Frame Of Reference. which means a framework that is used for the observation and mathematical description
is another dog running a good refrence point to describe the motion of a dog