Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Qtr 2 Wk 3 Forces

### Qtr. 2, Wk. 3: Forces

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

Force | a push or pull exerted on an object; a force is described by its strength and its direction; F = m x a |

Newton | the SI unit for force; lifting a lemon requires about 1 newton of force |

Net Force | the combination of all forces acting on an object; determines whether or not the object will move and also the direction of movement |

Unbalanced Forces | forces that produce a nonzero net force, causing an object to move, stop moving, or change direction |

Balanced Forces | equal forces acting on an object in opposite directions; results in 0 net force and no change in motion |

Friction | the motion-opposing force exerted by surfaces when objects are in contact with each other; factors include surface conditions and the objects' weights |

Gravity | the force that pulls objects toward each other; factors include the objects' masses and distance apart |

Mass | the SI measure for how much matter is in an object; measured in kilograms or grams |

Newton's First Law of Motion | An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force; aka 'Law of Inertia' |

Inertia | the tendency of an object to resist any change in motion; is dependent upon the object's mass |

Newton's Second Law of Motion | The acceleration of an object depends on the object's mass and on the net force acting on the object; aka 'Law of Acceleration' |

Newton's Third Law of Motion | If an object exerts a force on another object, the second object exerts a force of equal strength in the opposite direction on the first object; aka 'Action/Reaction Law' |

Momentum | a characteristic of any moving object equal to the product of the object's mass and velocity (kg x m/s) |

Created by:
Rita.Rogers