Question

We generally say "Tree is at rest or a pole is at rest". When absolute rest and absolute motion have no meanings. Then is it correct to say like this.

Answer 1

Absolute Rest:
A body is said to be at absolute rest when that object is in an incomplete state of rest.
Absolute Motion:
A body is said to be in absolute motion if it does not depend on anything external to the moving object for it to exist.

"Tree is at rest or a pole is at rest". When absolute rest and absolute motion have no meanings. Then it is not correct to say this because:

1. Rest and motion are relative terms.
2. One body can be at rest with respect to another body, but at the same time it can be in motion with respect to a third body.
3. So, there can be no absolute rest and absolute motion possible, and both rest and motion are relative terms.
4. Here, the tree and the pole are at rest as well as in motion.
5. These are considered at rest when we consider these with respect to the other moving objects on the earth's surface.
6. But these are also considered in motion because the earth is continuously revolving around the Sun.

So, we can conclude that it is not correct to say, "Tree is at rest or a pole is at rest".