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 why sharp objects penetrate easily, how hydraulic systems work, and why wide foundations are used for buildings.

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 the area over which the force is applied decreases.

3. Importance of Pressure Calculation

Details: Pressure calculations are crucial in engineering, construction, fluid mechanics, and understanding everyday phenomena like why snowshoes prevent sinking in snow.

4. Using the Calculator

Tips: Enter the force in Newtons and area in square meters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: Why does a sharp knife cut better?
A: A sharp knife has a smaller contact area (A), so even with the same force (F), the pressure (P) is much higher.

Q3: How is pressure different from force?
A: Force is the total push or pull, while pressure is how concentrated that force is over an area.

Q4: What's atmospheric pressure at sea level?
A: Approximately 101,325 Pa or 101.325 kPa.

Q5: How does pressure relate to fluid pressure?
A: Fluid pressure follows the same principle but considers depth and density of the fluid (P = ρgh).