Recent content by jennyskywalker

  1. J

    Finding Mechanical Energy without knowing Efficiency

    I asked on another forum, and they said ME= mgh, but according to my teacher, PE (potential energy)=mgh, and I'm looking for Mechanical energy!
  2. J

    Finding Mechanical Energy without knowing Efficiency

    727.2 kcal? But that is the total energy expended, including heat energy. ME=(efficiency x 727.2)/100. That's all I know!
  3. J

    Finding Mechanical Energy without knowing Efficiency

    Homework Statement A 65 kg man goes for a 72 minute hike up a mountain that is 400.0 metres in vertical height. The energy consumption rate for this climb is 10.1 kcal/min. What is the Mechanical Energy (useful work energy) expended for this hike? (in kcal) Homework Equations ME=...