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# Evans Physics

### Physics Formulas

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

Average velocity | X/t |

Definition of acceleration | (V-Vo)/t |

Displacement in terms of V, Vo and t. | (1/2)(Vo+V)t |

Final velocity | Vo+(a)(t) |

Displacement in terms of Vo,t, and a. | Vo(t)+(1/2)(a)(t^2) |

Final Velocity Squared | Vo^2+ 2(a)(x) |

Newton's Second Law (aka net force) | (m)(a) |

Friction | (the mew sign)(Fn) |

Work | Fs(cosign of theta) |

Net Kinetic Energy | (1/2)(m)(v^2) |

Work- Kinetic Energy Theorem | {W=change in kinetic |

Potential gravity: | (m)(g)(h) |

Potential elastic: | (1/2)(K)(X^2) |

Power in terms of work and time: | W/t |

Power in terms of force and velocity: | (F)(V) |

Momentum | (M)(v) |

Impulse Momentum Theorem | Fav(t)=change in momentum |

Centripetal Acceleration | V^2/R |

Centripetal Force | (M)(V^2)/R |

Newton's Universal Law | (G)(M1)(M2)/(R^2) |

Effiency | Wout/Win |

Mechanical Advantage | Fout/Fin=Sin/Sout |

Torque | (R)(F)(sin of theta) |

Pressure | F/A |

Work Done On/By a Gas | -P(deltaV) |

1st Law of Thermo | (DeltaV)= Q + W |

Efficiency of a Heat Engine | (QH-QC)/ QH |

Hooke's Law | -kx |

Speed of a Wave | f(wavelength) |

Period of a Pendelum | 2 |

The Mirror Equation | 1/f=1/So+ 1/Si |

Harmonics for a closed pipe | nV/4L |

Harmonics for an open pipe | nV/2L |

Intensity | P/4(Pi)r^2 |

Magnification | Hi/Ho= -Si/So |

Created by:
93issyjan