Answer:
2940.1 joules would you burn in climbing stairs all day.
Explanation:
Work = W = F[tex]\times[/tex] d
going up stairs would be against force of gravity
W = mgh
where h is the height
the question is not complete because we need speed or distance
h = v [tex]\times[/tex] t
so assuming 1 step per second
h = 86,400 steps [tex]\times[/tex] 7inchs/step [tex]\times[/tex] 0.0254 m/inch
h = 15362 m
so from this
W = 800 N [tex]\times[/tex] 15362
= 12289600 J
that means YOU need 12289600 J to walk 1 step per second all day
divide that by 4180 J /Kcal
Kcal = [tex]\frac{W}{(J/Kcal)}[/tex]
= [tex]\frac{12289600}{4180}[/tex]
= 2940.1 Kcal
if you ran faster you would use more energy 2 steps per second would mean 5880 Kcal.
