重臂 (zhòngbì): load arm (of a lever)

Meanings

Gànggǎn de zhòngbì yuè duǎn, shěnglì xiàoguǒ yuè hǎo.

The shorter the load arm of a lever, the more force it saves.

Wùlǐ kè shàng lǎoshī jiǎngjiěle zhòngbì hé lìbì de gàiniàn.

In physics class the teacher explained the concepts of load arm and effort arm.

usage

Standard physics-textbook term, paired with 力臂 (lìbì, effort arm). Reading is zhòng (heavy/load), not chóng (again). The lever rule: 力 × 力臂 = 重 × 重臂.

mistakes

重 here = zhòng ("heavy / load"), not chóng ("again, repeat"). Wrong tone makes it sound like "repeat-arm" — a non-word.

重 zhòng

臂 bì