Let’s say a small person with a mass of 50 kg walks up two flights of stairs. a heavy person with a mass of 105 kg walks up the same stairs. who did more work and why?

me, i'm very confused

Heavier person

Explanation:

Work = force × distance.  In this case, force = weight and distance = height of the stairs.  For both people, the height of the stairs is the same.  Since the heavier person has more weight, they did more work.

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.