# Explain what exactly is absolute motion with an example?

## Question:

Explain what exactly is absolute motion with an example?

## Universal Frame of Reference:

If a body is changing its position with respect to observer then the body is said to be in motion with respect to the observer. The case of the state of the rest of a body is just the opposite which is if the position of a body is not changing with respect to the observer.

• There is no such thing called absolute motion or absolute rest for a body in-universe.
• The state of rest or state of motion is a purely relative phenomenon.
• For example, two persons sitting on the bus are at rest state with respect to each other however they are both moving to a third person who is standing on the pavement outside the bus.
• To avoid any confusion and discrepancies in the calculation concept of FRAME OF REFERENCE is introduced in the observations and measurements.
• The frame of reference must be inertial (all physics laws must be applicable).
• Therefore, in the above example the two persons sitting on the bus are in one frame of reference while the person outside in another.
• In the physics domain there is no existence of any universal frame of reference so no possibility of absolute motion