This is the 6897th most frequent Japanese word.
ペンデュラム
Pendulum.
In this sentence, 'ペンデュラム' refers to the physical apparatus used in experiments to demonstrate oscillatory motion.
彼は実験のためにペンデュラムを使った。
He used a pendulum for the experiment.
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.