"pendulum motion" is a correct and usable phrase in written English.
It refers to the regular, swinging motion of a pendulum, often used as an example in physics and mathematics. Example: "The scientist demonstrated the concept of pendulum motion by setting up a simple pendulum and measuring its period of oscillation."
Various methods of recording pendulum motion have been developed.
In the more-modern optical method, pendulum motion causes a mirror to move.
Others indulged in repetitive head movements, while two birds developed a complicated pendulum motion of the head and body.
"I believe [golf is] the art of controlling the body and club and swinging the pendulum motion.
A flexible barrier, placed inside the cart, constrains the pendulum motion.
Indeed, Prokofiev modelled his musical material partly on Moussorgsky's: as in the Coronation Scene, a chord progression sways across the interval of the tritone, in unrelenting pendulum motion.
Dynamic response of tower cranes coupled with the pendulum motions of the payload is studied in this paper.
Dynamics of a real luffing crane model with the spherical and planar pendulum motions is analyzed using the proposed formulations and computational method.
Analysis tools such as the phase trajectory, bifurcation diagram and Poincaré map are used to investigate the motion characteristics of this submerged payload which is undergoing constrained pendulum motions in various scenarios.
Cristiano Banti's Salviati also held it could be experimentally demonstrated by the comparison of pendulum motions in air with bobs of lead and of cork which had different weight but which were otherwise similar.
Double-Pendulum motion was computed according to classical mechanics: the two plates were released from non-equilibrium initial configuration and freely oscillated back and forth under gravity around a fixed point placed at the top of the upper plate (negligible friction).
