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# Mr. Scanlan 2Dmotion

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

Projectile Motion | Motion of an object with an initial horizontal component, that then experiences free fall. |

Vector | Physical quantity that has both magnitude and direction |

Scalar | Physical quantity with only a magnitude |

Resultant | A vector that represents the sum of two or more vectors |

All motion is relative because of the observer's | Frame of reference |

Wind velocity is a (vector or scalar)? | Vector |

Speed is a (vector or scalar)? | Scalar |

Free fall velocity is a (vector or scalar)? | Vector |

A car accelerating is a (vector or scalar)? | Vector |

Mass of a car is a (vector or scalar)? | Scalar |

Driving east you throw a ball also east from the car, is its overall velocity faster or slower than the car? | Faster |

Driving east (10 mph)you throw a ball west from the car (5 mph), is its overall velocity faster or slower than the car? | slower |

Projectile motion has two vector components, one is vertical and the other is | Horizontal |

"True" projectile motion follows what path? | Parabolic |

"True" projectile motion only occurs in the absence of | Air resistance |

Is a volleyball served over a net a projectile? | Yes |

Is a ball dropped vertically from a building a projectile? | No |

Is a homerun in baseball a projectile? | Yes |

What is the path of a projectile in the absence of air resistance? | A parabola |

Are there any "true" projectiles in the earth's atmoshphere under normal daily conditions? | No |