Physical Science- Fluid Pressure

Pressure

Is the result of a force distributed over an area

Pressure’s Formula

P= Force/Area

Force’s Formula

F= P•A

Area’s Formula

A= F/P

Unit of Force

Newton (N)

Unit of Area

Square meter (m2)

SI unit of pressure

Pascal (Pa)

Pascal

A pascal is one newton per square meter (N/m2)

Relationship between water pressure and depth

Water pressure increases as depth increases

Pressure in a fluid

The pressure in a fluid at any given depth is constant, and it is exerted equally in all directions.

Fluid

A substance that assumes the shape of its container.

Types of Fluids

Liquids and gases are fluids

Examples of fluids

Water, oil, gasoline, air, and helium

2 factors that’s determine the pressure the fluid exerts

Depth and the type of a fluid are two factors that determine the pressure the fluid exerts.

Vases with a different amount of liquid

The liquid levels are the same because pressure depends on depth, not amount.

Relationship between air pressure and altitude

Air pressure decreases as the altitude increases.

Earths atmosphere exerts pressure of about 101kPa at sea level, why aren't you crushed by air pressure?

The pressure inside your body balances the air pressure out-side. The balanced forces cancel, resulting in a net force of zero.