Pressure applied to the ground by a man standing on stilts

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SUMMARY

The pressure applied to the ground by a 52 kg man standing on square stilts measuring 0.06 m on each edge is calculated using the formula p = F/A, resulting in a pressure of 207,100 Pa. The total force is derived from the man's weight (mg), while the total area is calculated based on the dimensions of the stilts. The discussion emphasizes that pressure is an intensive variable and does not accumulate with multiple stilts, as forces do. The weight of the stilts is generally considered negligible in this calculation.

PREREQUISITES
  • Understanding of basic physics concepts, specifically pressure and force.
  • Familiarity with the equation p = F/A for calculating pressure.
  • Knowledge of unit conversions, particularly from kg to Newtons.
  • Basic geometry to calculate the area of square objects.
NEXT STEPS
  • Explore advanced applications of pressure calculations in different contexts.
  • Learn about the implications of pressure in materials science and engineering.
  • Investigate the effects of varying stilt weights on pressure calculations.
  • Study intensive vs. extensive properties in physics for a deeper understanding.
USEFUL FOR

Students studying physics, engineers working with load-bearing structures, and anyone interested in the mechanics of pressure and force distribution.

sebastian281172
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Homework Statement
How much pressure is applied to the ground by a 52 kg man who is standing on square stilts that measure 0.06 m on each edge?
Relevant Equations
p=(F/A)
Homework Statement: How much pressure is applied to the ground by a 52 kg man who is standing on square stilts that measure 0.06 m on each edge?
Homework Equations: p=(F/A)

P = (F/A)
= (52*9.81)/(.06^2)
= 207100
 
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How many stilts is he using?
 
it doesn't matter because of it all factors back to the equation on top.

Ex. ((ab)/2 + (ab)/2)/c

= (2ab/2)/c
= ab/c
 
Pressure is an intensive variable. You don't add the pressures. Forces are additive, pressures are not. The total force is mg, the total area is 2*0.062.

<< Solution deleted by a Mentor >>
 
Last edited by a moderator:
ohh thanks, i didn't know that
 
sebastian281172 said:
Homework Statement: How much pressure is applied to the ground by a 52 kg man who is standing on square stilts that measure 0.06 m on each edge?
Homework Equations: p=(F/A)

P = (F/A)
= (52*9.81)/(.06^2)
= 207100

There are normally two stilts, are there not? The stilts themselves must weigh something.
 
PeroK said:
There are normally two stilts, are there not? The stilts themselves must weigh something.
I'd think that if it asks for what pressure the man is applying to the ground, the stilts are probably treated as negligible to the solution.
 
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CardiniPanini said:
I'd think that if it asks for what pressure the man is applying to the ground, the stilts are probably treated as negligible to the solution.
Which is a dubious assumption, IMO. Unless you specify ultra lightweight stilts, perhaps.
 

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