noun
principle of leverage; law of the lever
Refers to the physical principle that a lever amplifies force; used in physics and everyday explanations.
てこの原理を使えば、重い物も小さな力で持ち上げられる。
Using the principle of leverage, even heavy objects can be lifted with a small force.
この道具はてこの原理を応用している。
This tool applies the principle of leverage.
Compound of てこ (lever) + の (possessive particle) + 原理 (principle). The word てこ is of native Japanese origin, while 原理 is a Sino-Japanese word.