Related Resources: vibration

Simple Pendulum Natural Frequency and Period Equations and Calculator

Machine Design and Engineering

Simple Pendulum Natural Frequency and Period Equations and Calculator

Simple Pendulum Natural Frequency and Period Equations and Calculator

ωn = [ g / l ] (1/2)

T = 2π ( l / g )(1/2)

Where:

Nodes are indiated in images as a proportion of length l measured from the the left,
g = Acceleration of Gravity, ( 32.2 ft/sec2, 9.81 m/s2 )
l = Length (ft, m)
ωn = Angular Natural Frequency ( rad / sec or Hz)
T = Period (sec)

1 rad/sec = 1/( 2π ) Hz

Related and Useful Links:

Reference Harris, Shock and Vibration Handbook