Question

define observer,motion,and rest​

Answer 1

Answer:

The correct terms to be referred are 'Frame of Reference', 'Motion' and 'Rest'

Explanation:

The Frame used by the observer to observe a body or its surroundings is called as a Frame of Reference. It is the platform used to observe a body.

eg: A man observes a car. The frame of reference of the man is Earth.

If the body appears to have a change in its position w.r.t to the Frame of Reference, it is said that the body is in Motion.

If the body does not have a change in position with respect to its surroundings, it is said to be at Rest.  

If the Frame of Reference change, the motion of the body also changes.

Answer 2

Answer:

1. person who watches or notices something.
2. the action or process of moving or being moved.
3. cease work or movement in order to relax, sleep, or recover strength.