When a body is said to be in motion with respect to an observer? Give one example.

Fill Column B with the words given in the box below:

$\left[\mathrm{weight}, \mathrm{km}, 0°\mathrm{C}, \mathrm{unit} \mathrm{of} \mathrm{length}, \mathrm{capacity}, \mathrm{litre}, \mathrm{periodic} \mathrm{event}, \mathrm{unit} \mathrm{of} \mathrm{temperature} \right]$

Which part of the moving bicycle shown in the figure alongside undergoes rotatory motion?

Vikram and Shruti are sitting at the back seat of a moving car. Vikram says both of us are at rest while Shruti says both of us are in motion. Then they decided to place their problem before the science teacher. Next day they went to school and requested about their problem to the teacher. The teacher explained such problems with concerning facts.

What are the values displayed by Vikram and Shruti?