urp:physgen

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urp:physgen [2021-11-08] nerf_herder [Optics] |
urp:physgen [2022-02-01] nerf_herder [Newton's 3 laws] |
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- | ==== General Physics ==== | + | ===== General Physics ===== |

- | * [[#Newton's 3 laws]] | + | |

- | * [[#Distance, time, velocity, acceleration]] | + | |

- | * [[#Collisions]] | + | |

- | * [[#Inclined plane]] | + | |

- | * [[#Projectile fired at an angle]] | + | |

- | * [[#Buoyant force]] | + | |

- | * [[#Gravity]] | + | |

- | * [[#Kinematics]] | + | |

- | * [[#Miscellaneous]] | + | |

====Newton's 3 laws==== | ====Newton's 3 laws==== | ||

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Basic definitions: | Basic definitions: | ||

- | * Force is in newtons or pounds. One newton = 1kg * m / s² (the force needed to accelerate 1kg at 1 m/s²) | + | * **Force** is in newtons or pounds. One newton = 1kg * m / s² (the force needed to accelerate 1kg at 1 m/s²) |

* f = ma | * f = ma | ||

- | * Momentum is p | + | * **Momentum** is p |

* p = mv | * p = mv | ||

- | * energy = work (joules) = force * distance | + | * **energy or work** (joules) = force * distance |

* J = F*d = applying 1 newton for 1 meter (units of kg * m²/s²) | * J = F*d = applying 1 newton for 1 meter (units of kg * m²/s²) | ||

* F = J/d | * F = J/d | ||

- | * power = work/time (joules/sec or watts) | + | * Work is positive if it is applied in the same direction as movement |

+ | * No (net) work is done moving an object horizontally some set distance (unless you overcome friction) - it does not gain or lose potential energy, or have increased kinetic energy at the conclusion | ||

+ | * **power** = work/time (joules/sec or watts) | ||

Fnet = Δp / Δt (since p = mv and Δv/Δtime = acceleration) | Fnet = Δp / Δt (since p = mv and Δv/Δtime = acceleration) | ||

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When parallel force > friction, it is unbalanced and objects will move down the plane | When parallel force > friction, it is unbalanced and objects will move down the plane | ||

Applied force - friction = net force | Applied force - friction = net force | ||

+ | |||

+ | ====Friction==== | ||

+ | Coefficient of friction | ||

+ | * μ = f/N (force applied divided by Normal force) | ||

+ | * fNet = fApp - Ffriction | ||

static friction - | static friction - | ||

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N = normal force) must be overcome before the mass moves | N = normal force) must be overcome before the mass moves | ||

μS = fs/N = m*g*sin(θ) / m*g*cos(θ) = sin(θ)/cos(θ) = tan(θ) | μS = fs/N = m*g*sin(θ) / m*g*cos(θ) = sin(θ)/cos(θ) = tan(θ) | ||

- | kinetic friction - normal moving friction | + | kinetic friction - moving friction |

only one type of friction applies at a time | only one type of friction applies at a time | ||

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DV = dependent variable - the variable measured (changes because of the experiment) y axis | DV = dependent variable - the variable measured (changes because of the experiment) y axis | ||

+ | FBD = free body diagram - a drawing of mass and all the forces that are applied to it. | ||

Back to the [[physics]] page or the [[00_start|start]] page. | Back to the [[physics]] page or the [[00_start|start]] page. |

urp/physgen.txt · Last modified: 2022-02-01 by nerf_herder