Question

When is a body said to be in motion in relation to an observer

Answer 1

IF THE POSTION OF THE BODY CHANGES CONTINUOUSLY


HI!!!!
i am giving you an example i think by reading the example your doubt will be cleared..
imagine you are sitting in a moving train,you will observe that you are in motion with the trees,the platforms because your position is continuously changing with respect to them.However, if you compare yourself and the person sitting beside you or in front of you, you will see that their position is not changing.Thus,whether a given object is at rest or in motion depends on the observer and the surroundings.