力学

• Reading: りきがく
• Romaji: rikigaku
• Kanji breakdown: 力 (riki/ryoku) — force, power, strength; 学 (gaku) — study, learning, science
• Pronunciation: /ɾi.ki.ɡa.kɯ/

Meaning

Mechanics; dynamics. The branch of physics dealing with the motion of objects and the forces that cause or affect motion.

力学 encompasses statics (静力学) and dynamics (動力学), and is divided into classical (古典力学), quantum (量子力学), and relativistic mechanics. As a suffix, -力学 forms compound disciplines such as 熱力学 (thermodynamics), 流体力学 (fluid mechanics), and 統計力学 (statistical mechanics). Also used figuratively for the underlying forces driving social, political, or economic systems.

Examples

1. ニュートン力学は日常スケールの物体の運動を高精度で記述することができる。 Newtonian mechanics can describe the motion of objects at everyday scales with high precision.
2. 流体力学の知識は航空機や船舶の設計に欠かせない基礎となっている。 Knowledge of fluid mechanics is an indispensable foundation for the design of aircraft and ships.
3. 国際政治の力学を理解するには、経済的利益と安全保障の両面を考慮する必要がある。 Understanding the mechanics of international politics requires consideration of both economic interests and security.

Usage Guide

Context: physics, engineering, academia, social analysis

Tone: analytical

Origin & History

Compound of 力 (force, power) + 学 (study, science). A Meiji-era translation of the Western concept of 'mechanics', combining the key physical element (force) with the academic suffix.

Cultural Context

Era: Meiji–Modern

Generation: Adults (academic)

Social background: Academic/Technical