# Physics Final - January 21, 2016

rename
vepikuno's
version from
2016-01-21 12:12

## Section

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

momentum unit | m/s |

area underneath graph | applied force |

p = mv | one object |

p before = p after | two objects |

p before = p after | explosions |

p before = p after | collisions |

J = F net t = delta p = m delta v | something changes about the object |

J = F net t = delta p = m delta v | impulse |

work unit | joules |

power unit | watts |

pulling a box or sled | cos theta |

work can be | potential or kinetic |

PEg | g = 9.81 |

PEg | vertical |

PEg | gravitational potential energy |

PEg | height |

PEg | lifting |

PEs | spring |

PEg unit | joules |

two objects in kinetic energy | add the masses |

KE graph is a | curve |

what is x in PEs=1/2kx | elongation |

what is x in PEs=1/2kx | change in length from equilibrium |

what is x in PEs=1/2kx | compression |

ball | change in velocity |

kg | use 9.81 |

final and initial | final-inital |

friction problems | steals, subtract the difference |

total mechanical energy | remains the same |

velocity | kinetic energy |

falls freely | use 9.81 |

Newtons | the force |

impulse unit | n/s |

mass | scalar |

acceleration is less | you weigh less |

acceleration is more | you weigh more |

gravitational potential energy | only depends on height |

gravitational potential energy | does not change if the height does not change |

mass of a student | 60 kg/600 N |

distance | shaded area under velocity/time graph |

mass | net weight |

mass | inertia |

mechanical energy | PEg+PEs+KE |

F∥ | arrow down left (before) |

F⟂ | arrow down right (after) |

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