---
title: "Surface Tension — AP Physics 2 Definition & Exam Guide"
description: "Surface tension makes a liquid's surface act like a stretched elastic sheet. See how it connects to cohesion, capillary action, and AP Physics 2 fluid systems."
canonical: "https://fiveable.me/ap-physics-2-revised/key-terms/surface-tension"
type: "key-term"
subject: "AP Physics 2"
---

# Surface Tension — AP Physics 2 Definition & Exam Guide

## Definition

Surface tension is the property of a liquid that causes its surface to behave like a stretched elastic sheet, allowing it to resist external forces and minimize its surface area.

## Related Study Guides

- [1.1 Fluid Systems](/ap-physics-2-revised/unit-1/fluid-systems/study-guide/L6C6nyy2cUQzRMzlWuni)

## Review

### Related Terms

- Capillary action: Capillary action refers to the ability of a liquid to flow against gravity in narrow spaces or tubes due to adhesive and cohesive forces.
- Meniscus: The meniscus is the curved upper surface of a liquid in a container caused by capillary action and adhesive forces between the liquid and container walls.
- Cohesion: Cohesion is the attraction between molecules of the same substance, causing them to stick together.