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# Forces

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

Forces are a | push or a pull on an object |

Newton's First Law | an object in motion remains in motion unless acted upon by an unbalanced force (forces are balanced) |

Newton's Second Law | force is directly related to an object's mass and acceleration (forces are unbalanced) |

Newton's Third Law | For every action there is an equal and opposite reaction |

Example of Newton's First Law | A car going a constant speed |

Example of Newton's Second Law | A car accelerating |

Acceleration | when an object speeds up, slows down, or changes direction |

Example of Newton's Third Law | Gases of rocket push ground down and ground pushes gases of rocket up. |

A toy car has a 5 N applied in the forward direction as well as a frictional force of 2 N. What is the net force acting on the car? | 3 N |

What is the acceleration of a 10 kg object that has a force of 20 N? | 2 m/s^2 |

If a ball is hit with 4x the force, it will result in _______ the acceleration? | 4x |

If an object is accelerating its net force is? | Not 0 N |

What is the relationship between mass and acceleration? | inverse or indirect |

Weight is ______. | force of gravity on an object |

A 0.02 kg piece of gum hits a paper projectile with a 1 N force. If the projectile is now traveling at a constant velocity, what is its acceleration | 0 N |

If a 100 kg female traveled to the moon where gravity is 1/6th of the Earth's gravity (g of moon= 1.63 m/s^2), how much would she weigh? | 163 N |

If a ball has a mass of 30 N on the Earth, what is it's mass on the moon (g of moon = 1.63 m/s^2) | 30 N |

What is the unit of force? | N |

What is the unit of mass? | kg |

What is the unit of acceleration? | m/s^2 |

What is the unit of speed? | m/s |

What is another way to write the unit of a Newton? | kg*m/s^2 |

What do call the force that is perpendicular to the surface? | Normal Force |

The opposite of the thrust force on an airplane is the _____. | drag force |

The opposite of the weight force on an airplane is the _____. | lift force |

True or False: A force is any interaction that changes and object's motion. | True |

True or False: A force is necessary to continue an object's motion. | False |