2026-08-16 10:32:30: Translational Kinetic Energy

.obsidian/workspace.json

@@ -48,9 +48,37 @@
               "icon": "lucide-file",
               "title": "Spring Force"
             }
+          },
+          {
+            "id": "a43250c06a5815f1",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "physics/Work Energy and Power/Work Energy and Power.md",
+                "mode": "source",
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Work Energy and Power"
+            }
+          },
+          {
+            "id": "c320b38b4fa41973",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "physics/Work Energy and Power/Translational Kinetic Energy.md",
+                "mode": "source",
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Translational Kinetic Energy"
+            }
           }
         ],
-        "currentTab": 2
+        "currentTab": 4
       },
       {
         "id": "25da4f0a48a8e7cd",
@@ -234,14 +262,17 @@
       "obsidian-excalidraw-plugin:New drawing": false
     }
   },
-  "active": "33e06a1402832f18",
+  "active": "c320b38b4fa41973",
   "lastOpenFiles": [
+    "physics/Work Energy and Power/Work Energy and Power.md",
+    "physics/Work Energy and Power/Translational Kinetic Energy.md",
+    "physics/Force and Translational Dynamics/Spring Force.md",
+    "physics/Work Energy and Power",
     "physics/Force and Translational Dynamics/Gravitational Force.md",
     "physics/Force and Translational Dynamics/Newton's First Law.md",
     "physics/Force and Translational Dynamics/Newton's Second Law.md",
     "physics/Force and Translational Dynamics/Newton's Third Law.md",
     "physics/Force and Translational Dynamics/System and Center of Mass.md",
-    "physics/Force and Translational Dynamics/Spring Force.md",
     "physics/Force and Translational Dynamics/Circular Motion.md",
     "physics/Force and Translational Dynamics/Forces and Freebody Diagrams.md",
     "physics/Force and Translational Dynamics/Force and Translational Dynamics.md",
@@ -268,9 +299,7 @@
     "Assets/Pasted image 20260814125859.png",
     "Assets/Pasted image 20260815093612.png",
     "literacy/fallacies.md",
-    "literacy/literacy.md",
     "Assets/Pasted image 20260814131131.png",
-    "chemistry/polar molecules.md",
     "physics/Force and Translational Dynamics",
     "Assets/Pasted image 20260813174454.png",
     "Assets/Pasted image 20260813175101.png",
@@ -280,7 +309,6 @@
     "Recording 20260716183349.m4a",
     "Recording 20260716183320.m4a",
     "biology",
-    "medical",
-    "math"
+    "medical"
   ]
 }

physics/Work Energy and Power/Translational Kinetic Energy.md

@@ -0,0 +1,16 @@
+[[Work Energy and Power]]
+
+Formula is: $$K=\frac{1}{2}mv^2$$
+$K$ in joules
+$m$ in kg
+$v$ in m/s
+
+* Kinetic energy is scalar, only magnitude and never negative.
+* Because velocity is squared, changing speed affects energy more than changing mass.
+* For a system of objects, total kinetic energy is the sum of each object's kinetic energy.
+* Different observers in different reference frames can calculate different kinetic energies.
+
+If a dude standing on earth sees a 1kg ball travelling at 10m/s, he'll calculate it as 50J. If a dude taped to the ball calculates it he'll calculate 0J. If a theoretical god looked at it from a universal standpoint he'd probably calculate like $1*10^6$ Joules due to Earth orbiting the sun and the solar system orbiting the Milky Way.
+
+In a collision, total energy before and after is consistent in the observers frame.
+

physics/Work Energy and Power/Work Energy and Power.md

@@ -0,0 +1,3 @@
+[[physics]]
+WEaP
+