In which one of the following cases will the distance covered and the magnitude of the displacement are not the same? Justify.

(i) A passenger in a train travels from Delhi to Kolkata.

(ii) A raindrop falling in still air.

(iii) An athlete completes one lap in a race.

State whether displacement is a scalar or a vector quantity.

What is the displacement of a satellite when it makes a complete round along its circular path?

After studying the motion of a ball rolling on a straight line as shown in the figure.

Find its distance and displacement covered.

(i) when it rolls from P to Q and then to R (i.e., P to Q to R)

(ii) Finally comes back to P (i.e., P to P)(take, P as reference point).

Define average speed, write any one point of difference between average speed and average velocity.