Question

Q1.Why displacement is zero even when distance travelled is not zero ?

Answer 1

because displacement is the distance between the starting point and the finishing point.

Answer 2

By definition, distance is the total path travelled by a body but the displacement is the shortest distance travelled by a body from initial position to final position.

For example to understand this, if a boy travels 120 m from his house to shop and again returns back to his house then-

Distance= 120 m

Displacement= 0 (as he returns back to his initial position again)

That is why, in some cases like the above example displacement is zero even if the distance travelled is not zero.