If a 60.0 kg person will need to climb a 10.0 m stairway how may times to work off each excess Cal (kcal) consumed?

Answer 1

I find it very odd that heat/work problems are being assigned in kcal (Food Cal). That is about 50 years out of date in science.

work=force*height= 60kg(9.8N/kg)*10m*n

now, to convert 1Cal to joules, put this in your google search window
1 kcal in Joules

418joules=60*9.8*10*n
solve for n

and, it is less than once up the stairs. One food calorie is not much energy.

Answer 2

Thanks.......I really don't understand anything my instructor assigns! He really tries to make this class really difficult by not explaining anything.