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# Motion

### notebook P.83-97

What is the definition for speed? | The distance an object travels in one unit of time |

What is the definition for Acceleration? | The rate at which velocity changes |

What is the definition for Reference Point? | A place or object used for comparison to determine if something is in motion |

What is the definition for velocity? | Speed in a given direction |

What is the definition for average speed? | Total distance traveled divided by the total time |

What is the definition for constant speed? | when the speed of the object does not change during a time period. |

What is motion? | The state in which one object's distance from another is changing |

State three ways in which acceleration can change. | Acceleration can change if the object speeds up, slows down, or changes direction. |

How do we know motion has occurred? | There must be a change in distance/position and a reference point |

What do you do if you have two velocities in the same direction ex: 15 km/hr North and 3 km/hr North | You need to add, The total velocity is 18 km/hr North |

What do you do if you have two velocities in different directions? ex: 40 miles/hr North and 50 miles/hr South | You need to subtract. The total velocity is -10 miles/hr |

Calculate the answer: A cyclist travels 28 km during the first two hours of riding and 8 km during the next hour. What is the average speed? | Show your work: 12 km/hour |

A car traveling at 40m/s slows down to 20m/s over a period of 5 seconds. What is the cars acceleration? | Show your work: 4m/s2 |

Which plane travels a greater distance: A plane that travels 6,000m/hr in 8 hours or one that travels or one that travels 12,000m/hr in 4 hours | both travel the same distance 48,000m |

If an object is traveling at constant speed, how can it accelerate? | The object can speed up, slow down or change direction |

Explain what a reference point is and why it is important | A reference point is an object in the background that can be used to determine if an object is in motion. There must be a distance created between the object and the reference point in order for us to determine that motion has occurred. |

What is the equation for speed? | d/t |

What is the equation for time? | d/s |

What is the equation for distance? | s x t |

what is the equation for average speed? | total distance / total time |

What is the equation for acceleration | final velocity-initial velocity time |

Created by:
uclabruin03