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# MMS Force and Motion

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

Force | A push, pull, or change in direction |

magnitude | the strength of a force (greater magnitude = bigger force) |

gravity | the force of 1 object with mass pulling on another object with mass |

mass | the amount of "stuff" or matter in an object |

Newtons | The unit of measurement for force (N) |

Acceleration | speeding up, slowing down, or changing direction |

Speed | Distance divided by time or how far an object travels in a certain amount of time |

Friction | A force that exists between two objects and is always the opposite of motion. |

Balanced Force | When an object is NOT accelerating (speeding up, slowing down, or changing direction) |

Unbalanced Force | When an object is accelerating (speeding up, slowing down, or changing direction) |

Newton's 1st Law | The Law of Inertia - an object that is moving will keep moving and an object at rest will stay at rest UNLESS another force acts on the object |

Newton's 2nd Law | F=m x a When mass increases, force will increase. When acceleration increases, force will increase. |

Newton's 3rd Law | For every force there is another force acting in the opposite direction but equal in size |