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A simple pendulum, is a concentration of mass on the end of a string or rod

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Introduction

A simple pendulum, is a concentration of mass on the end of a string or rod. When the string is set in motion, it will swing with a constant frequency. The time taken for each oscillation, its period, is dependant upon the length of the string. This frequency is given by the equation : . ...read more.

Middle

See free vibration. Another type of pendulum is made up of a stiff body (with its own mass) vibrating about an axis. For these pendulums their orientation will not matter, they will oscillate with a constant frequency whether they have a mass attached to the top or the bottom of the stiff body. ...read more.

Conclusion

They are stiff bodies with concentrations of mass up their length. ie.at the floor levels where beams are attached to the columns. They columns in buildings can be looked at as being very stiff pendulums. This idea is expanded on in the video clips, the free and forced vibration page and in the design and analysis of buildings in earthquakes. ...read more.

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