# Conical pendulum

## Description

A conical pendulum is a weight (or bob) fixed on the end of a string (or rod) suspended from a pivot. Its construction is similar to an ordinary pendulum; however, instead of rocking back and forth, the bob of a conical pendulum moves at a constant speed in a circle with the string (or rod) tracing out a cone. The time required for the bob of the conical pendulum to travel one revolution depends on the horizontal circle’s radius and the angle between the leg and the hypotenuse.

Related formulas## Variables

t | Time for one revolution (sec) |

π | pi |

r | Horizontal circle's radius (m) |

g | Standard gravity |

θ | The angle between the leg and the hypotenuse (radians) |