The oscillatory motion of a simple pendulum: Oscillatory motion is defined as the periodic to and fro motion of the pendulum, with the center of oscillation known as the equilibrium position.
You can make the pendulum on the right heavier by adding weight to the bottom. However, because the weight has no effect on the effect of gravity on an object, the two pendulums continue to swing at the same rate. However, by adding weight to the middle of the other pendulum, you effectively make it shorter.
The Weight Of A Pendulum Called:
Bob is the mass at the end of a pendulum, which is most commonly, but not always, found in pendulum clocks.
A simple pendulum is made up of a small metal ball (called the bob) suspended by a long thread from rigid support, allowing the bob to swing back and forth. If the length of a pendulum is kept constant, it will complete every swing (or oscillation) at exactly the same time.