The school of a boy from his home is 1km to the east. When he reaches back home, he says thathe had travelled 2km distance but his displacement is zero. Justify your answer.
Answers
Answer:
Distance is a scalar quantity.
It refers to how much length one has covered during its motion from one place to another.
Displacement is a vector quantity.
Its the overall change in position of the object.
Suppose a person goes from point A to B, then distance covered may be 1 km. But if he returns from point B to A, then distance covered will be 2 km but displacement will be zero.
Because destination is same.
Therefore, here in this situation, the boys goes to school from home = 1km
Boy comes to home from school = 1 km.
Total = 2km but since destination did not change and he returns to starting point , therefore displacement is zero.
Another way to do the answer-
Distance is the path travelled by an object.
Displacement is the shortest path between source and destination.
DISTANCE is scalar quantity and Displacement is vector quantity.
Here DISTANCE between school and boy's House is 1km.
He goes to school from home and comes back to home.
So TOTAL DISTANCE he travelled is :
=1km +1km
=2km
But the displacement travelled by body is zero = 1km - 1km=0 km
As the source and destination is same.
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