From ee6d600923682586f58dcdfe941a19674c246e3a Mon Sep 17 00:00:00 2001 From: johnruina Date: Mon, 17 Aug 2026 09:49:11 -0400 Subject: [PATCH] vault backup: 2026-08-17 09:49:11 --- .obsidian/workspace.json | 32 +++++++++++++------ literacy/buzzwords.md | 3 +- .../Work Energy and Power/Potential Energy.md | 4 +-- physics/Work Energy and Power/Power.md | 24 ++++++++++++++ physics/Work Energy and Power/Work.md | 2 +- 5 files changed, 52 insertions(+), 13 deletions(-) create mode 100644 physics/Work Energy and Power/Power.md diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json index 474cfcc..c03f944 100644 --- a/.obsidian/workspace.json +++ b/.obsidian/workspace.json @@ -118,9 +118,23 @@ "icon": "lucide-file", "title": "Conservation of Energy" } + }, + { + "id": "fd4f04ae3f91eb93", + "type": "leaf", + "state": { + "type": "markdown", + "state": { + "file": "physics/Work Energy and Power/Power.md", + "mode": "source", + "source": false + }, + "icon": "lucide-file", + "title": "Power" + } } ], - "currentTab": 7 + "currentTab": 8 }, { "id": "25da4f0a48a8e7cd", @@ -304,20 +318,23 @@ "obsidian-excalidraw-plugin:New drawing": false } }, - "active": "713a2ea9096a5d46", + "active": "fd4f04ae3f91eb93", "lastOpenFiles": [ - "physics/Work Energy and Power/Potential Energy.md", - "physics/Force and Translational Dynamics/Conservation of Energy.md", "physics/Work Energy and Power/Work.md", - "physics/Work Energy and Power/Translational Kinetic Energy.md", "physics/Work Energy and Power/Work Energy and Power.md", + "literacy/buzzwords.md", + "literacy/fallacies.md", + "literacy/literacy.md", + "physics/Work Energy and Power/Power.md", + "physics/Work Energy and Power/Potential Energy.md", + "physics/Work Energy and Power/Translational Kinetic Energy.md", + "physics/Force and Translational Dynamics/Conservation of Energy.md", "biology/Cell Structure and Function/Cell Structure and Function.md", "biology/Cell Structure and Function/Origins of Cell Compartmentalization.md", "biology/Chemistry of Life/structure of water and hydrogen bonding.md", "biology/Chemistry of Life/Macromolecules.md", "biology/Chemistry of Life/Lipids.md", "biology/Chemistry of Life/Carbohydrates.md", - "literacy/fallacies.md", "physics/Force and Translational Dynamics/Newton's Second Law.md", "physics/Force and Translational Dynamics/Newton's First Law.md", "physics/Force and Translational Dynamics/Newton's Third Law.md", @@ -329,9 +346,6 @@ "physics/physics.md", "physics/plancks constant.md", "physics/quantum mechanics.md", - "physics/thermal expansion.md", - "physics/Thermodynamics.md", - "physics/constants.md", "Assets/Pasted image 20260816081041.png", "physics/Work Energy and Power", "Assets/Pasted image 20260816073410.png", diff --git a/literacy/buzzwords.md b/literacy/buzzwords.md index 02e101b..01b419c 100644 --- a/literacy/buzzwords.md +++ b/literacy/buzzwords.md @@ -19,4 +19,5 @@ hale - to compel to go / (archaic) to pull draw drag or hoist incongruence - out of place/absurd olfactory - part of sensory system used for smells nebulous - misty/foggy/mysterious -umbra - shadowy part \ No newline at end of file +umbra - dark area +exergy - useful energy \ No newline at end of file diff --git a/physics/Work Energy and Power/Potential Energy.md b/physics/Work Energy and Power/Potential Energy.md index 447e45a..243e3a4 100644 --- a/physics/Work Energy and Power/Potential Energy.md +++ b/physics/Work Energy and Power/Potential Energy.md @@ -1,7 +1,7 @@ [[Work Energy and Power]] megumi energy -# SUMMARY +# Summary * potential energy refers to multiple objects in a system affecting each other with conservative forces * In MY words, potential energy is j stored kinetic energy that something has due to its surroundings, and it cashes it out and converts the PE to KE. * Scalar @@ -10,7 +10,7 @@ megumi energy * Gravitational potential energy between 2 spherical masses: $U_g=-G\frac{m_1m_2}{r}$. Near surface approximation: $\Delta U_g=mg\Delta y$ * For a system with more than 2 objects, potential energy is sum of energy of every pair. -## Zero Potential Energy Definition +# Zero Potential Energy Definition * Can define zero PE as any convenient reference point * For gravitational PE, a common ref point is ground level. * Springs equilibrium is the natural zero PE point. diff --git a/physics/Work Energy and Power/Power.md b/physics/Work Energy and Power/Power.md new file mode 100644 index 0000000..aa92ced --- /dev/null +++ b/physics/Work Energy and Power/Power.md @@ -0,0 +1,24 @@ +[[Work Energy and Power]] + +Power is how fast energy moves or changes form. + +# Summary +* SI Unit is Watts (W), where 1 W = 1J/s +* Average power is energy change over time: $P_{avg}=\frac{\Delta E}{\Delta t}$. Work changes energy so $P_{avg}=\frac{W}{\Delta t}$ +* Instantaneous power for a constant force: $P_{inst}=F_{||}v=Fv\cos \theta$ using only force component parallel to velocity. +* Sign of power tells direction, positive means energy added negative means energy removed. +* When an object moves at a constant speed, energy is zero. + +# Average Power Calculation +$$P_{avg}=\frac{\Delta E}{\Delta t}$$ +Examples: +* 60 watt light bulb transfers 60 joules into light and heat. +* 1500 watt hair drier running for 5 minutes transfers 1500 * 300 watts. +* Solar panel generating 500 watts per second stores 500 joules to be used later. + +# Power as Work Rate +$$P_{avg}=\frac{W}{\Delta t}$$ +Power can be calculated by dividing work by time taken. + +# Instantaneous Force from Power +$$P_{inst}=F_{||}v=Fv\cos \theta$$ diff --git a/physics/Work Energy and Power/Work.md b/physics/Work Energy and Power/Work.md index 6297d85..9d71dde 100644 --- a/physics/Work Energy and Power/Work.md +++ b/physics/Work Energy and Power/Work.md @@ -7,7 +7,7 @@ * Conservative forces do path independent work that is zero in a full loop and stays the same no matter what path is taken to the endpoint (e.g. gravity) while non-conservative forces care about the path taken (e.g. air resistance). * Net work = $\Delta K = \Sigma W_i$ -## Conservative vs Non Conservative +# Conservative vs Non Conservative * Potential energy is conservative only * examples of conservative are gravity and spring * Conservative essentially means the work done only changes mechanical energy