In physics, pressure is defined as the force applied perpendicular to the surface of an object per unit area. Mathematically, pressure (P) is calculated using the formula:

**P = F / A**

Where:

The SI unit of pressure is the pascal (Pa), which is equal to one newton per square meter (N/m^{2}).

Pressure is influenced by both force and area. If the force applied to an area increases, the pressure also increases. Similarly, if the area over which the force is distributed decreases, the pressure increases. This relationship is described by the equation for pressure.

Pressure has various applications in everyday life and engineering. Some examples include:

- Hydraulic systems
- Atmospheric pressure and weather systems
- Pressure in fluids (Hydrostatic pressure)
- Pressure in gases (Gas laws)

When studying pressure, it's important to understand the following key concepts:

**Definition of Pressure:**Understand the definition of pressure and how it is calculated using the formula P = F / A.**Units of Pressure:**Familiarize yourself with the SI unit of pressure, the pascal (Pa), and its relation to the newton and square meter.**Pressure in Fluids and Gases:**Learn about the differences in pressure in fluids and gases, and how it relates to the behavior of liquids and gases under pressure.**Applications of Pressure:**Explore real-world applications of pressure in various systems and industries, such as hydraulic systems, weather patterns, and more.**Pressure and Force:**Understand the relationship between pressure and force, and how changes in force and area affect the pressure exerted on a surface.

By mastering these concepts, you'll be well-prepared to tackle problems and questions related to pressure in physics.

Remember to practice solving numerical problems involving pressure, as this will reinforce your understanding of the topic.

Good luck with your studies!

.PHYSICAL SCIENCE (NGSS)

Energy

Students who demonstrate understanding can:

Create a computational model to calculate the change in the energy of one component in a system when the change in energy of the other component(s) and energy flows in and out of the system are known.

Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as either motions of particles or energy stored in fields.