Pressure due to an elephant and atmospheric pressure

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SUMMARY

The pressure exerted by an elephant's weight on the ground through its four feet is less than 1 atmosphere (atm), yet this pressure can crush a human due to the body's inability to withstand sudden, localized force. While humans are in equilibrium with atmospheric pressure, the additional pressure from an elephant's weight creates a harmful effect when it is transmitted through the body to the ground. This phenomenon is illustrated by the difference in pressure experienced when squeezing an egg in hand versus against a hard surface.

PREREQUISITES
  • Understanding of atmospheric pressure and its effects
  • Basic knowledge of human anatomy, particularly the rib cage
  • Familiarity with pressure distribution concepts
  • Experience with practical demonstrations of pressure (e.g., egg experiment)
NEXT STEPS
  • Research the physics of pressure distribution in solid objects
  • Explore the effects of localized pressure on human anatomy
  • Study the principles of equilibrium in biological systems
  • Investigate the mechanics of pressure in underwater environments
USEFUL FOR

Students of physics, biology enthusiasts, and anyone interested in understanding the mechanics of pressure and its effects on living organisms.

Pranav Jha
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The pressure exerted against the ground by an elephant's weight distributed evenly over its four feet is less than 1 atmosphere. Why, then, would you be crushed beneath the foot of an elephant, while you're unharmed by the pressure of the atmosphere?
 
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We're in equilibrium with our environment. Our bodies are well tuned at the correct pressure so there is no problem.

If an elephant steps on you you're adding on extra pressure that your body is not used to.
 
Divers can go underwater and experience pressures far greater than 1 atm.

The problem is when an elephant steps on you, that 1 atm has to go down through you, and into the ground. More specifically, through your curved rib cage and into the hard ground. That 1atm is not so friendly anymore under those conditions.

To demonstrate this effect, try squeezing an egg in your hand, and then try squeezing it against the hard ground. Report with the results :)
 
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