This is the 6897th most frequent Japanese word.
ペンデュラム
Pendulum.
Here, 'ペンデュラム' denotes the swinging component in traditional pendulum clocks.
時計の中にはペンデュラムが含まれている。
The clock contains a pendulum.
In this context, 'ペンデュラム' indicates the swinging motion of the pendulum being studied.
私たちはペンデュラムの動きを観察した。
We observed the movement of the pendulum.
In this sentence, 'ペンデュラム' refers to the physical apparatus used in experiments to demonstrate oscillatory motion.