Which object is commonly used to demonstrate oscillatory motion in physics?

The pendulum is a classic example used to demonstrate oscillatory motion in physics due to its simple harmonic behavior. When displaced from its resting position, a pendulum swings back and forth under the influence of gravity. This motion occurs around a central point and is characterized by a periodic movement, meaning it repeats at regular intervals. The key factors influencing the oscillation include the length of the pendulum and the acceleration due to gravity, making it a useful tool in physics to illustrate concepts such as energy conservation and periodicity.

While a spring also demonstrates oscillatory motion, particularly in the context of simple harmonic motion when compressed or stretched, the pendulum is often preferred because its motion is easier to visualize and the principles governing it can be more readily observed in a standard demonstration setting. Other options like a wheel and a gyroscope do not primarily exhibit oscillatory motion; instead, they are more associated with rotation and angular momentum.