Definition
A pendulum is essentially a weight that is hung from a fixed point. It is placed in such a way that it allows the device to swing freely to and fro. The pendulum bob of a simple pendulum is treated as a point mass. Further, the string from which it’s hanging is of negligible mass.
T = 2π√(L/g)
T= Period in seconds
π= The Greek letter Pi which is almost 3.14
√= The square root of which we include in the parentheses
L= The length of the rod or wire in meters or feet
G= The acceleration due to gravity (9.8 m/s² on Earth)
Next up, we have the frequency equation. This calculates the numbers of times a pendulum swings back and forth within a second. We measure that in hertz. Thus, the frequency equation is:
f = 1/T
f = 1/[2π√(L/g)]