1. What is Pressure?

Definition: Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Purpose: Pressure calculations are essential in physics, engineering, and many practical applications like hydraulic systems, aerodynamics, and material science.

2. How Does the Pressure Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Pressure (Pascals)
• \( F \) — Force applied (Newtons)
• \( A \) — Area over which force is distributed (square meters)

Explanation: The force is divided by the contact area to determine the pressure exerted on that surface.

3. Importance of Pressure Calculation

Details: Understanding pressure helps in designing structures, predicting material behavior, and ensuring safety in various mechanical systems.

4. Using the Calculator

Tips: Enter the force in Newtons and the area in square meters. Both values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What are the units of pressure?
A: The SI unit is Pascal (Pa), but other common units include psi, bar, and atm.

Q2: How does area affect pressure?
A: For a constant force, pressure increases as area decreases (sharp knives cut better).

Q3: What's atmospheric pressure at sea level?
A: Approximately 101,325 Pa or 1 atm.

Q4: Can pressure be negative?
A: In physics, pressure is typically positive, but gauge pressure can be negative relative to atmospheric pressure.

Q5: How is pressure different from stress?
A: Pressure is external force per area, while stress is internal resistance force per area within materials.