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# PHYSics TEST

### Mrs. Eisenlord

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

When position changes compared to a reference point | motion |

Speed at one moment in time | instantaneous speed |

Total distance divided by total time | average speed |

A non-moving object used to detect if something is moving | reference point |

A graph that shows the motion of an object | position-time graph |

A push or a pull | force |

Most important constant force | gravity |

When forces are not equal and not opposite; cause changes in motion | unbalanced force |

When forces are equal and opposite; cannot change motion | balanced force |

A force that is always on an object | constant force |

A force that acts on an object for just a short bit of time | momentary force |

A force that acts in the direction opposite an object's motion | friction |

Stored energy | potential energy |

Energy that is being used | kinetic energy |

Heat energy | thermal energy |

Energy cannot be created or destroyed, but it can be _______ | transformed |

A line on a position-time graph that is going away from the reference point will be facing __ | up |

A line on a position-time graph that is moving toward the reference point will be facing ____ | down |

A line that means no motion will be ____ | flat |

What kind of line means that the speed is constant? | straight |

The x-axis on a position-time graph | time |

The y-axis on a position-time graph | position |

To solve an average speed problem, you use this operation | division |

To solve a distance problem, you use this operation | multiplication |

Gravity is shown in a force diagram as an arrow pointing ____ | down |

We show forces in diagrams as ______ | arrows |

Potential and kinetic are two types of ______ | energy |

The ______ an object is lifted, the more potential energy it has | higher |

If two objects are lifted to the same height, the object with more ____ will have more potential energy | mass |

If there are two lines on a position-time graph, the _______ one is faster | steeper |