Question

The estimate for one kilogram of body fat is 38 MJ of energy. A 87 kg hiker in Japan decides to climb a mountain 3900m high. If the body's efficiency in converting energy stored as fat to mechanical energy is 25%. determine a) the amount of fat the hiker will use up in providing the energy required to climb to the top of the mountain. b) instead of burning fat, how many protein bars would they have to eat in order to make the climb. Assume the hiker converts 20% of the food energy into mechanical energy, and that each protein bar has 225 calories (1cal=4184J)

Answer 1