How do you calculate pressure using force and area?

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SUMMARY

The discussion centers on calculating pressure using the formula P = F/A, where pressure (P) is derived from force (F) divided by area (A). The user provided a force of 30N and calculated the area using the formula A = πr² with a radius (r) of 0.01m, resulting in an area of approximately 0.0001π m². The initial calculation yielded a pressure of 10³ Pa, but upon reevaluation, the correct pressure is confirmed to be 10⁵ Pa, correcting a miscount of zeros in the area calculation.

PREREQUISITES
  • Understanding of basic physics concepts, specifically pressure calculations.
  • Familiarity with the formula P = F/A.
  • Knowledge of area calculations for circles, specifically A = πr².
  • Ability to perform unit conversions and manage significant figures.
NEXT STEPS
  • Review the principles of pressure in fluid mechanics.
  • Learn about unit conversions in physics, particularly between Pascals and other pressure units.
  • Explore advanced applications of pressure calculations in real-world scenarios.
  • Study common mistakes in area calculations and how to avoid them.
USEFUL FOR

Students studying physics, educators teaching pressure concepts, and anyone needing to apply force and area calculations in practical scenarios.

dinhjeffrey
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Homework Statement


http://img26.imageshack.us/f/1113001.jpg/

#16

Homework Equations



P=F/A


The Attempt at a Solution


F= 30N
A= πr^2
r= .01m
A = .0001π
P=F/A
P= 10^3 Pa
but the answer is E) 10^5 Pa
 
Physics news on Phys.org


What is 30/3.14 x 10^-4?

AM
 


95492 = 100,000 = 10^5 - oops miscounted the zeroes thanks lol
 

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