Question

A particle starts motion along x axis from (-3m,0)and go to (7m,0) and finally reach to position (-7m,0) and finally reach to position (-7m,0) What is total displacement covered by particle​

Answer 1

Though the moving object comes back to its initial position the distance travelled is not zero.

Displacement is calculated on the basis of initial and final position. If initial and final position are same, displacement is zero. But distance is the total distance covered from initial to final position. So, it cannot be zero in this case.