How is pressure defined?

How is pressure defined?

• A. Force per unit area, measured in psi
• B. Mass per volume
• C. Temperature per unit length
• D. Energy per unit time

Answer: (A)

Pressure is the force acting perpendicular to a surface divided by the area over which the force is applied. In other words, P = F/A. This is why pressure is measured in units like psi or pascals. In aviation systems, pressure governs how fluids transmit force in hydraulics and pneumatics, affecting braking, landing gear, and air systems. The other ideas don’t fit: mass per volume is density, not pressure; temperature per unit length isn’t a standard physical quantity; energy per unit time is power.

Pressure is the force acting perpendicular to a surface divided by the area over which the force is applied. In other words, P = F/A. This is why pressure is measured in units like psi or pascals. In aviation systems, pressure governs how fluids transmit force in hydraulics and pneumatics, affecting braking, landing gear, and air systems. The other ideas don’t fit: mass per volume is density, not pressure; temperature per unit length isn’t a standard physical quantity; energy per unit time is power.