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# Gould ch 11

### Reveiw for chapter 11

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

To describe motion accurately and completely, there must be a what? | frame of reference |

What is a system of objects that are not moving with respect to one another? | frame of reference |

What is movement in relation to a frame of reference? | relative motion |

This is the length of a path between two points. | distance |

What is the SI unit for measuring distance? | meter |

What is the SI unit for measuring very large distances? | kilometer |

What is the SI unit for measuring very short distances | centimeter |

What is the direction from the starting point and the length of the a straight line from the starting point to the ending point | displacement |

What gives information both about how far away an object is from a given point and in what direction the object is from that point | displacement |

What is a quantity that has magnitude and direction? | vector |

What does magnitude mean in a vector? | size, length, or amount |

What is it when vector magnitudes and directions are added together? | vector addition |

You can add two displacements if they are what? | same direction |

You subtract two displacements if they are what? | different direction |

The vector sum of two or more vectors is called what? | resultant vector |

The resultant vector points directly from the starting point to where? | ending point |

What is the ration of the distance an object moves to the amount of time the object moves? | speed |

SI unit of speed is what? | m/s |

The total distance traveled divided by the time it takes to travel that distance is what? | average speed |

What is the rate at which an object is moving at a given moment in time? | instantaneous speed |

What type of graph is a good way to describe motion? | distance-time |

The name of the slope of a line on a distance-time graph shows what? | speed |

Together the speed and direction in which an object is moving is called what? | velocity |

A change in velocity can be the result of what change(s)? | speed, direction, or both |

The rate at which velocity changes is called what? | acceleration |

Acceleration can be described as changes in what? | speed, direction or both |

An example of acceleration due to change and accelerate downward at a rate of 9.8m/s is what? | free fall |

Name the term that is movement of an object toward Early solely because of gravity. | free fall |

Give an example of acceleration due to changes in speed and direction. | roller coster |

Give an example of acceleration due to direction when you speed is constant | carousel |

What is a steady change in velocity? | constant acceleration |

Given an example of constant acceleration that results in changes to an objects velocity but has constant direction that was discussed in class. | aircraft takeoff |

How can you calculate acceleration for straight -line motion? | dividing velocity by the total time |

Name a graph that displays data form straight-line parts. | linear graph |

Name an example discussed in class of a linear graph that shows an increase in time-speed. | acceleration |

A graph that a curve connects the data points is what? | non-linear |

How fast a velocity is changing at a specific instant is called what? | instantaneous acceleration |

What is equal to distance/ time? | speed |

What is equal to speed multiplied by time? | distance |

What is equal to distance/speed | time |

What is equal to change in velocity / time? | acceleration |

Created by:
kathleengould