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# 1-D Kinemat.

### 1-D Kinematics

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

What is a Coordinate System? | A coordinate system is a grid usually with an X and Y Axis that helps determine movement of an object. North = Positive Y-Axis South = Negative Y-Axis East = Positive X-Axis West = Negative X-Axis |

What is a scalar quantity? Give an example. | A scalar quantity only represents magnitude (or size) of a measurement. Ex. Time - 60 seconds Speed - 50mph Distance - 60m |

What is a vector quantity? Give an example. | A vector quantity represents magnitude (or size) and direction of a measurement. Ex. Velocity = 60mph East Displacement = -45m to the West Momentum = -60kgm/s |

What is magnitude? | Magnitude = size of a measurement. **Think magnitude of earthquakes! |

What is velocity? | Velocity describes an object's speed and direction. Equation: Velocity = Displacement/time Unit: m/s (Meters/second) |

What is speed? | Speed describes an object's rate of motion. Distance traveled over a given time period. Speed = distance/time |

What is displacement? | Displacement is a vector measurement of distance traveled from the origin, or starting point. This is how far you are away from the origin. Ex. If you ran all the way around a track (Started and stopped in the same spot) Displacement = 0m |

What is distance? | Distance is a scalar measurement of distance traveled from the origin. This is how far you have moved total. Ex. If you ran all the way around a track (Started and stopped in the same spot) Distance = 400m |

Time | A unit of measurement for a period of time is seconds. |

Terminal velocity | The maximum speed an object can reach because of the air resistance acting on the object. |

What is acceleration? | Acceleration measures the change in velocity over a given time period. Acceleration IS a change in velocity. *Change in speed OR change in direction. Equation- a=∆V/t a - acceleration ∆V - change in velocity t - time units = m/s/s |