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# Circular Motion

Question | Answer |
---|---|

When calculating angles in circular motion we use units of? | Radians |

To convert from degrees to radians we multiply by | pi/180 |

To convert todegrees from radians multiply by | 180/pi |

Angular velocity is.... | the angle swept out by a radius per unit time, symbol w |

The units for angular velocity is | rad/s |

angular velocity = | angle change/time |

angular velocity is also related to | the frequency of a system |

angular velocity also = | 2 x pi x f |

The time period of a system can be eqauted to | 1/f or 2pi/angular velocity |

The linear speed of an object moving in a circle is related to | its angular velocity |

linear speed = | radius x angular velocity |

The force on an object moving in a circular path is also called | centripetal force |

the size of a centripetal force is given by either | F=mv^2/r or mrw^2 |

centripetal acceleration = | v^2/r or rw^2 |