A body is being pulled by strings from the left and right. Tension in the strings is the same, ma. The same body is being pulled by one string from the left and by two strings from the right. Tension in all three strings is the same, ma. Let the body in two figures be A and B.
Are A seen from B and B seen from A symmetrical ? No, that's not, because the internal stresses in body A and B are different.
