Question
Explain by giving an example that rest and motion are the relative terms i.e. a body can be simultaneously at rest as well as in motion.
Solution
Rest and motion are relative terms. A body can be simultaneously at rest as well as in motion.
Let two persons A and B be sitting in a moving train and a third person be at the platform. Here the position of A does not change with respect to B. Therefore, A is at rest as per B. But, position of A changes with respect to C with time. Hence A is in motion with respect to C.
