Estimating Pressure on a Person Standing on the Ground

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Homework Help Overview

The discussion revolves around estimating the pressure exerted by a person standing on the ground. The subject area includes concepts from mechanics and fluid dynamics, particularly focusing on pressure calculations.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore modeling the person as a cylinder and consider the relationship between force, area, and pressure. There are questions about whether to include air pressure in the calculations and how to determine the appropriate area for pressure estimation.

Discussion Status

The discussion is active, with participants sharing their thoughts on the setup of the problem and the relevant equations. Some guidance has been provided regarding the use of force and area to find pressure, but there remains uncertainty about the assumptions and the problem's context.

Contextual Notes

Participants express confusion regarding the relevance of fluid dynamics to the problem, as it is presented alongside other fluid-related questions. There is an emphasis on estimating the area under the feet for pressure calculations.

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Homework Statement


What pressure does a person standing on the ground exert?

Homework Equations


The Attempt at a Solution


This has something to do with fluids, but I'm not sure what!

I think I should model the person as a cylinder and find the pressure on the person, then find what the pressure is on the ground?

I really have no idea, that was just a guess. I don't know how to find the pressure on the person either...

Can anyone please get me started?
 
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Okay so I found this F = p*a
 
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The force would be her weight (not her mass) and the area would be the one under her feet. Find the pressure.
 
I think I'm confused about the set up of the problem.

Force = 80 kg * 9.81 m/s^2

Area = area of top or bottom of cylinder?

then use F = area * pressure to find pressure?

So this has nothing to do with air pressure at all? Just confused because it's in with a bunch of other problems dealing with pressures from fluids, and I thought maybe air pressure contributes somehow.
 
The way I understand it, it has nothing to do with fluid. Just estimate the area under the feet of Emma (that's why the problem ask for an estimation of the pressure) and then use F = PA.
 

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