Comment on the statement 'rest and motion are relative terms'. Give an example.

Fill in the blanks using one of the words: at rest, in motion.

(a) A person walking in a compartment of a stationary train is ………………. relative to the compartment and is ………………. relative to the platform.

(b) A person sitting in a compartment of a moving train is ……………….. relative to the other person sitting by his side and is ………………….. relative to the platform.

What do you mean by translatory motion? Give one example.

Explain the meanings of:

(i) rectilinear motion

(ii) curvilinear motion

Give one example of each.