(adsbygoogle = window.adsbygoogle || []).push({}); Energy Question -- Burning off Breakfast

Im not to good at physics to begin with, and Ive been having alot of trouble with this question:

"How many steps does it take to wear off your breakfast?"

First of all this question doesnt give you any starting points with variables and such and I really have no clue what kind of equation to use.

I am using Shredded Wheat & Bran as my breakfast (30g per serving (160ml)) without milk and this contains 450kJ from the back of the box nutritional facts.

I assumed that each step would take approx. 1 meter in length and that the person burning off the breakfast weights 70kg. I dont know if this info is relavent to the question but im kinda stuck.

I thought if I could figure out how many joules were burn each step by this person I could divide that by the total joules of breakfast and figure out how many steps it will take

I would think that W=Fd would be the starting equation but I dont have a variable with Newtons

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

Dismiss Notice

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: Energy Question - Burning off Breakfast

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