When going up stairs does a person who has more mass do more work and exert more power?

Answer 1

Wt. = M*g

Work = Mg * h
Therefore, the person with the most wt.
will do the most work if both covered the same distance up. If they did not
cover the same distance, you will have to calculate the work done by each to
make a comparison.

Power is the rate of doing wt.

P = Mg * h/t
So if both persons covered the same distance up in the same amount of time, the heavier person will do the most work. However, if their ratio of h/t
is different, You'll have to calculate
the power of each and compare.