Angad and Nalin were observing a building having two different staircases. One slanting and other vertically spiral. Angad was of the opinion that a person using slanting staircase will be doing more work against gravity but Nalin though otherwise. They started quarrelling. Arif, their friend, explained and gave entirely different view and pacified them.
What according to you was the explanation given by Arif?

Explanation

Arif explained that gravitational force is a conservative force. Hence work done to lift a body to the same height will be the same, whatever may the nature of the path be. So,a person using slanting staircase or vertically spiral staircase will do the same work as the height is same.