Consider a rod AB rotating about one of it's end A with angular velocity w. Now angular velocity of each point of the rod is same i.e. w. But if we have to find the relative angular velocity of the end B w.r.t. mid point of rod, what it will be? Will it be zero because, w-w=0 or first we have to find the velocity of end B which is wR(R is length of Rod) then find velocity of mid-point wR/2 and then find relative velocity of end B w.r.t. to mid point which is wR-wR/2=wR/2 then divide it by distance between B and mid point which is R/2 and get relative angular velocity which now comes out to be w. Which method is right and why the other method is wrong?