Question

A point A is placed at a distance of 7 m from the origin, another point B is placed at a distance of 10 m from the origin. What is the relative position of B with respect to A?

(a) 3 m from A

(b) 4 m from A

(c) -3 m from A

(d) 5 m from A

The question was posed to me in quiz.

Question is taken from Motion in a Straight Line in division Motion in a Straight Line of Physics – Class 11

Answer 1

Right answer is (a) 3 m from A

The best I can explain: Relative displacement of B with respect to A = Displacement of B -Displacement of A. On solving we get, relative displacement = 3 m. Hence B is placed at a distance of 3 m from A.