Lets assume your mass is 60 kg . You run up 200 stairs, each 16 cm high, in 28 s , at constant velocity.
In kilojoules, how much work do you do against gravity
work = force * distance = (60*9.81)* (200*0.16) J
extra credit: what power was expended?
In kilojoules, how much work do you do against gravity
extra credit: what power was expended?