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# ch.4 acceleration

### accelerated motion in a straight line

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

acceleration | rate of change in the speed of an object |

delta | "the change in" |

constant acceleration | speed that changes by the same amount every second |

uniform acceleration | another word for constant acceleration |

slope | rise to run.rise:amount the speed changesrun:amount the time changes |

term | piece of an equation |

initial speed | first term of the formula is the speed the object starts with |

free fall | moving under the influence of gravity only |

acceleration due to gravity | symbol:(g)equation:9.8m/sec2 |

time of flight | object takes the same time going up as it takes coming down |

friction | when air resists the motion of objects moving through it |

air resistance | when small objects at low speeds is neglected by air |

terminal speed | maximum speed at which an object falls when limited by air friction |

acceleration equation | acceleration=change in speed/change in time=meters per second/second=meters/second X second=m/sec2 |