noun
falling weight; drop-weight
Engineering term for a weight used in impact tests, such as drop-weight tests or falling-weight impact strength measurements.
落錘試験で材料の衝撃強度を評価する。
Evaluate the impact strength of the material with a drop-weight test.
Compound of 落 (drop, fall) and 錘 (weight, spindle). The exact historical derivation is uncertain; the spelling is conventionally associated with the engineering meaning.