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CBSE Class 9 Answered

when do we say that an displacement is zero?
Asked by | 19 Jan, 2014, 11:58: AM
answered-by-expert Expert Answer
When initial and final position of the object during motion is same its displacement is zero.
Distance and displacement are two different quantities.
 
Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. 

Displacement is a vector quantity that refers to the object's overall change in position.

Exampel:
A person walks 4 meters East, 2 meters South, 4 meters West, and finally 2 meters North.

Even though the person has walked a total distance of 12 meters, his displacement is 0 meters. It is because the  initial position and final position are same.

 
 
 
Answered by Komal Parmar | 19 Jan, 2014, 02:17: PM

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