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# Linear Motion

### motion

the background or object that is used for to describe the motion of a body | frame of reference |

the most common frame of reference | earth |

a change in position in a certain amount of time | motion |

rate at which an object moves ---distance traveled/time of travel | speed |

unit for measuring speed | meter(s) per second |

speed of a body does not change | constant speed |

displacement/time | average velocity |

the speed of a body and the direction it travels | velocity |

velocities that are in the same direction are combined by | adding them |

velocities that are in the opposite direction are combined by | subtract the small from the large velocity |

the change in velocity of a body or a change in direction | acceleration |

change in velocity divided by the time during which this change occurs | acceleration |

a decrease in velocity is | negative acceleration |

an increase in velocity is | positive acceleration |

negative acceleration is known as | deceleration |

An object is __________________if its position reltive to a fixed point is changing. | moving |

How fast an object is moving | speed |

Formula for average speed is | total distance / time interval |

The speed of an object at a given moment in time | instantaneous speed |

How fast an object is moving and the direction of travel | velocity |

Velocity of an object does not change over time | constant velocity |

The rate at which velocity is changing | acceleration |

acceleration formula | change in velocity / time interval |

An object moving under the influence of gravity alone is called | free fall |

The acceleration of an object in free fall is about | 10 meters per second squared |

The formula for finding the weight of an object is | mass times acceleration due to gravity |

For each second of free fall, an object falls a _____________________ distance than it did in the previous second | greater distance |

On a speed -versus- time graph the slope represents speed per time, or __________ | acceleration |

Air resistance noticeably ___________ the motion of things with large surface area. | slows |

meters per second squared | unit for acceleration |

Created by:
johnwhitfield35125