Recent content by shuman0101

  1. S

    Need help with a problem involving work and calories

    Homework Statement A person whose mass is 70 kg runs up a flight of stairs through a vertical height of 6 m. If she uses her food with an efficiency of 10%, how many food calories does she have to consume to do this work? Homework Equations P.E=mgh=W (Output/input)*100 = Efficiency The...