From pendulum, by analogy with Latin second declension nouns, such as bacterium/bacteria, though Latin pendulum is the neuter singular form of the adjective pendulus, whose neuter plural is indeed pendula.
pendula
The form pendulums is significantly more common than pendula; however, pendula is occasionally used in physics, particularly in the phrase "coupled pendula."
pendula
pendula
pendula
a pendula (third-person singular present pendulează, past participle pendulat) 1st conj.
infinitive | a pendula | ||||||
---|---|---|---|---|---|---|---|
gerund | pendulând | ||||||
past participle | pendulat | ||||||
number | singular | plural | |||||
person | 1st person | 2nd person | 3rd person | 1st person | 2nd person | 3rd person | |
indicative | eu | tu | el/ea | noi | voi | ei/ele | |
present | pendulez | pendulezi | pendulează | pendulăm | pendulați | pendulează | |
imperfect | pendulam | pendulai | pendula | pendulam | pendulați | pendulau | |
simple perfect | pendulai | pendulași | pendulă | pendularăm | pendularăți | pendulară | |
pluperfect | pendulasem | pendulaseși | pendulase | pendulaserăm | pendulaserăți | pendulaseră | |
subjunctive | eu | tu | el/ea | noi | voi | ei/ele | |
present | să pendulez | să pendulezi | să penduleze | să pendulăm | să pendulați | să penduleze | |
imperative | — | tu | — | — | voi | — | |
affirmative | pendulează | pendulați | |||||
negative | nu pendula | nu pendulați |