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# PBHS Force

### Force Unit

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

newton | SI unit of force |

Inertia | Resistance to any change in motion |

Law of Inertia | Newton's 1st Law of Motion is often called the |

net force | The total or sum of all forces acting on an object |

balanced forces | Condition when all of the forces add up to zero or "cancel each other out" |

unbalanced forces | Condition when the net force is not zero or the forces do not "cancel each other out" |

acceleration | Unbalanced forces result in this |

mass | The amount of inertia something has depends on its amount of |

Newton's 1st Law of Motion | This law is often called the law of inertia |

Newton's 2nd Law of Motion | This law describes the relationship of force and mass to acceleration |

F = ma | The formula for Newton's 2nd Law of Motion is this |

friction | Motion is always opposed by |

terminal velocity | When weight is balanced by air resistance an object falls at this constant velocity |

simultaneous | The action-reaction force pairs occur at this time |

forces | In Newton's 3rd Law of Motion, the ____ are equal in size, but opposite in direction. |

Law of Conservation of Momentum | The total momentum is the same before and after a collision. This states this law. |

Newton's 2nd Law of Motion | F = ma is the formula for this law |

momentum | p = mv is the formula for |

air resistance | Terminal velocity is reached when weight has been balanced by |

weight | An object's mass times gravity gives the object's |

force | Because weight is due to gravity, weight in physics is a |

9.8 m/s/s | On Earth, objects accelerate due to gravity at this rate |

velocity | Momentum depends upon an object's mass and |

Newton's 3rd Law of Motion | For every action there is an equal and opposite reaction |

Newton's 1st Law of Motion | An object at rest will stay at rest and an object in motion will stay in motion in the same direction at the same speed unless acted upon by an unbalanced force |

Created by:
gkarlish