Class 9 Answered

Two cars covers a equal distance in same time but in opposite directions.

We know, displacement is a vector quantity. The magnitude as well as direction has to be taken into the account. 

It is given that the cars covers distance 'x' in a given time. 

 

So, if the displacement of car A moving in North direction = + x 

Then, the displacement of car B moving in south direction = - x 

 

Thus, the displacement of car moving towards south will be ' - x' (vectors has to be written along with their sign which denotes the direction of an object moving is in opposite direction to the another object)