Question

Give an example where object is at rest and also in motion at the same time

Answer 1

Whether a object is in rest or motion depends upon the reference frame by which you are observing , Different reference frame may give different answers.Example : If you are travelling in a train and a woman is sitting near you. you will see the woman near you as stationary but if someone is observing the woman from outside the train he will see as if the woman is moving with the speed of train.Hence the two different reference point has given two results.



A particle when viewed from a given frame of reference cannot be both at rest and in motion. However, in one frame of reference, a particle can be in motion where as in another frame of reference the particle is in motion. For example, if you are seated in a plane, the plane is stationary in that reference frame and the Earth moves under it, but in the reference frame of the Earth, the plane if moving with respect to the Earth. When your are standing still on Earth, in your frame of reference, the Earth is stationary, and the Sun and stars move around the Earth. However, in the frame of reference of our solar system, the Earth orbits the Sun and the Sun is perturb slightly by the rest of the planets, but the rest of the galaxy orbits our solar system. Of course, in rest from of our Galaxy, our solar system orbits a giant black hole at its center.