1. What is Pressure in Physics?

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

Purpose: Understanding pressure helps explain phenomena like why sharp knives cut better, why skis prevent sinking in snow, and how hydraulic systems work.

2. The Pressure Formula

The calculator uses the formula:

Where:

• \( P \) — Pressure (Pascals, Pa)
• \( F \) — Force (Newtons, N)
• \( A \) — Area (square meters, m²)

Explanation: Pressure increases when force increases or when area decreases. Smaller contact area means greater pressure for the same force.

3. Importance of Pressure Calculation

Details: Understanding pressure helps in designing structures, tools, and machines. It explains everyday phenomena and is fundamental in fluid mechanics.

4. Using the Calculator

Tips: Enter the force in Newtons and area in square meters. Both values must be > 0. The result shows pressure in Pascals (Pa).

5. Frequently Asked Questions (FAQ)

Q1: What is the SI unit of pressure?
A: The SI unit is Pascal (Pa), which equals 1 Newton per square meter (N/m²).

Q2: How does area affect pressure?
A: For a given force, pressure increases as area decreases. This is why sharp knives cut better - same force on smaller area creates more pressure.

Q3: What are some common pressure units?
A: Besides Pascals, common units include atmospheres (atm), millimeters of mercury (mmHg), pounds per square inch (psi), and bars.

Q4: What is atmospheric pressure?
A: The pressure exerted by the weight of the atmosphere, approximately 101,325 Pa at sea level.

Q5: How is pressure different from force?
A: Force is the total push or pull, while pressure is how concentrated that force is over a given area.