We are asked if the following statement is a correct assumption:

*A 200-lb man decides to add to his exercise routine by walking up three flights of stairs (45 ft) 20 times per day. He figures that the work required to increase his potential energy in this way will permit him to eat an extra order of French fries, at 245 Cal, without adding to his weight.*

We need to calculate the **Potential Energy** of the man at the given height. Potential energy is calculated as:

$\overline{){\mathbf{P}}{\mathbf{.}}{\mathbf{E}}{\mathbf{.}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}{\mathbf{m}}{\mathbf{\times}}{\mathbf{g}}{\mathbf{\times}}{\mathbf{h}}}$

Where:

m = mass

g = acceleration due to gravity (9.8 m/s^{2})

h = height

We are given the mass that is **200 lb**, converting this to **kg**, we have:

*1 kg = 2.2 lb*

A 200-lb man decides to add to his exercise routine by walking up three flights of stairs (45 ft) 20 times per day. He figures that the work required to increase his potential energy in this way will permit him to eat an extra order of French fries, at 245 Cal, without adding to his weight.

Is he correct in this assumption?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Internal Energy concept. You can view video lessons to learn Internal Energy. Or if you need more Internal Energy practice, you can also practice Internal Energy practice problems.