Physics Formula
Pressure Formula
Calculates force distributed over a surface area.
Formula Summary
Pressure
Calculates force distributed over a surface area.
- Category
- Physics
- Equation
- P = F ÷ A
- Calculator
- Use Pressure Calculator →
Equation
P = F ÷ A
Variables
- P = pressure
- F = normal force
- A = area
How to Use This Formula
- Identify the known values from the problem statement.
- Convert all values into compatible units.
- Substitute the values into the equation and calculate the result.
- Check that the final answer has the correct unit and meaning.
Explanation
Pressure describes how much force is applied over a given area. The same force creates higher pressure when applied over a smaller area.
Worked Example
A 100 N force applied over 5 m² creates pressure of 100 ÷ 5 = 20 Pa.
Common Mistakes
- Confusing pressure with force.
- Using incorrect area units.
- Forgetting that pressure decreases when area increases.
Applications
- Fluid and gas pressure calculations.
- Engineering and mechanical systems.
- Laboratory measurements involving force distribution.
Related Formulas
Ideal Gas Law
PV = nRT
Relates pressure, volume, amount, and temperature of an ideal gas.
Learn formula →