here is a question that I am unable to solve:(adsbygoogle = window.adsbygoogle || []).push({});

The average human, of mass 52 kg needs to have approximately 9,000,000 J of energy per day. Suppose, you had to walk up a hill with an incline of 12 degrees. Determine the following:

a) how high would the hill have to be (i.e. - change in height) in order to consume all of this energy.

b) how much work did gravity do in all of this walking?

for A, i know you have to use the formula Eg=mgh but i am not sure where to sub in the energy as 9,000,000J or sin 12*9,000,000 (since its at an angle)

B) i dont knoe what role gravity plays in this?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Question related to energy

**Physics Forums | Science Articles, Homework Help, Discussion**