Two cars moving in opposite directions cover same distance "d" in one hour. If the cars were moving in north-south direction, what will be the displacement in one hour?

Question

fretje · Answer

so two cars, on the same road in the same country, or on opposite sides of the world?
Doesn't matter: displacement "delta x" or short dx of the two cars together is two times the distance d :
dx = 2.d

anonymous · Answer

Yeah, answer is "2d".

fretje · Answer

that is when the earth is considered a fixed frame of reference from the observers point of view (most of us are fixed to earth).