Question

An athlete runs along a circular track. Of radius 20m what is his displacement after covering half a round.

Answer 1

His displacement will be equal to diameter of the circle, i.e.2x 20m=40 matter covering full round his displacement is zero as he is coming back to his original position.

But covering half the round he is located at a distance of circle diameter from his staring point.

So, displacement is 40m.