Name a physical quantity that essentially changes as a body moves.

$(a)$ Differentiate between distance and displacement.
$(b)$ Under what conditions is the magnitude of average velocity of an object equal to its average speed?

Distinguish between the terms distance and displacement.

What does the path of an object look like when it is in uniform motion?

The numerical ratio of displacement to distance for a moving object is

The displacement of a moving object in a given interval of time is zero. Would the distance travelled by the object also be zero? Justify your answer.