Definition

1. Noun:
   • A physical quantity describing the intensity of force distributed over a specific area: It is the amount of force applied perpendicular to the surface of an object per unit area over which that force is distributed.
   • A fundamental concept in physics and engineering: It quantifies the internal forces that particles of a material exert on each other, or the external force applied by one body on another across a contact surface.

Examples of Usage

• Noun:
  • The force per unit area at the bottom of the ocean is immense due to the weight of the water column above.
  • Engineers must calculate the force per unit area on a bridge's support pillars to ensure structural integrity.
  • When you inflate a tire, you are increasing the force per unit area of the air inside on the tire walls.

Advanced Usage

• "To withstand a force per unit area": to resist deformation or failure under a given pressure.
  • The submarine's hull is designed to withstand an enormous force per unit area.
• "To exert a force per unit area": to apply pressure.
  • The tool exerts a precise force per unit area to cut through the material cleanly.

Variants and Related Words

• Pressure (n): The most common synonym for force per unit area in many scientific and everyday contexts.
  • Atmospheric pressure is the force per unit area exerted by the weight of the air.
• Stress (n): In mechanics, this often refers to the internal force per unit area within a material resisting deformation.
  • Tensile stress is the force per unit area that tends to stretch a material.

Synonyms

• Pressure: The force exerted per unit area.
• Compression: Specifically, force per unit area that tends to reduce volume.

Related Phrases

• Normal stress: Stress (force per unit area) acting perpendicular to a surface.
• Shear stress: Stress (force per unit area) acting parallel to a surface.
• Hydrostatic pressure: The force per unit area exerted by a fluid at equilibrium at a given point within the fluid.

Related Idioms

Note: As a precise scientific term, "force per unit area" is not typically used in idiomatic expressions. Its common synonym, "pressure," is used idiomatically. - Under pressure: Experiencing stress or being forced to act quickly. - The team is under pressure to finish the project on time. (This idiom uses the metaphorical sense of "pressure," not the literal physical quantity.)

Noun

1. the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit)
   • the compressed gas exerts an increased pressure