Question 964377
i believe his displacement is zero.


this is because displacement is a vector quantity that measures change in position.


if you end up at the point where you started from your displacement has to be equal to 0.


here's a reference that i believe addresses the question.


<a href = "http://www.physicsclassroom.com/class/1DKin/Lesson-1/Distance-and-Displacement" target = "_blank">http://www.physicsclassroom.com/class/1DKin/Lesson-1/Distance-and-Displacement</a>