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# Science 8-5

### Speed and Motion

Term | Definition |
---|---|

Velocity | most like speed BUT IT INCLUDES DIRECTION " vector quantity that refers to "the rate at which an object changes its position." " |

acceleration | the change in the rate of speed over a period of time; " vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity." |

Formula for figuring out Velocity | V=d/t Velocity = distance divided by time |

Formula for figuring out Acceleration | A=V2 - V1 divided by time A=v/t |

Label for velocity | mi/hr (miles per hour), km/hr (kilometers per hour), m/hr (meters per hour), m/sec (meters per second), . . . etc |

Label for acceleration | m/sec2 (meters per second squared) |