The distance-time graph of a body is a straight line inclined to the time axis. The body is in:

Four cars $A$,$B$,$C$ and $D$ are moving on a levelled road. Their distance versus time graphs are shown in the figure. Choose the correct statement.

The graph given below is the distance-time graph of an object.
$(i)$ Find the speed of the object during the first four seconds of its journey.
(ii) How long was it stationary?
(iii) Does it represent a real-life situation? Justify your answer.

What can you say about the motion of a body if its displacement$-$time graph is a straight line parallel to the time axis?

Can the distance travelled by a particle be zero when displacement is not zero?

State whether the following statements are true or false:
$1$. The motion in animals is called locomotion.
$2$. Mechanics deals with the motion of non-living objects.