Question

A typical human consumes 2500 Kcal of energy during a day. This is the equivalent to 10,450,000 J! Say you decided to run stairs all day. Given that there are 86,400 seconds / day, how much energy, in Joules, would you burn in climbing stairs all day?

Answer 1

Answer:

2940.1 joules  would you burn in climbing stairs all day.

Explanation:

Work = W = F$\times$ 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 $\times$ t

so assuming 1 step per second

h = 86,400 steps  $\times$ 7inchs/step $\times$ 0.0254 m/inch

h = 15362 m

so from this    

W = 800 N $\times$ 15362

   = 12289600 J  

that means YOU  need 12289600 J to walk 1 step per second all day

divide that by 4180 J /Kcal  

Kcal =  $\frac{W}{(J/Kcal)}$

       = $\frac{12289600}{4180}$

       = 2940.1 Kcal

if you ran faster you would use more energy  2 steps per second would mean 5880 Kcal.