diff --git a/.obsidian/graph.json b/.obsidian/graph.json
index a17b427..65021a9 100644
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+++ b/.obsidian/graph.json
@@ -17,6 +17,6 @@
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 }
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diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 1c31344..474cfcc 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -104,9 +104,23 @@
               "icon": "lucide-file",
               "title": "Potential Energy"
             }
+          },
+          {
+            "id": "efec690eab1c5e4d",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
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+                "file": "physics/Force and Translational Dynamics/Conservation of Energy.md",
+                "mode": "source",
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+              "icon": "lucide-file",
+              "title": "Conservation of Energy"
+            }
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@@ -290,10 +304,11 @@
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+    "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",
     "biology/Cell Structure and Function/Cell Structure and Function.md",
@@ -317,7 +332,6 @@
     "physics/thermal expansion.md",
     "physics/Thermodynamics.md",
     "physics/constants.md",
-    "physics/kinesmatics.md",
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diff --git a/physics/Force and Translational Dynamics/Conservation of Energy.md b/physics/Force and Translational Dynamics/Conservation of Energy.md
new file mode 100644
index 0000000..f3d2642
--- /dev/null
+++ b/physics/Force and Translational Dynamics/Conservation of Energy.md	
@@ -0,0 +1,28 @@
+[[Work Energy and Power]]
+
+# SUMMARY
+* System of one object can only have KE.
+* Mechanical energy is just KE + PE.
+* If work = 0 and no no conservative forces then ME = 0
+* If work is done then systems total energy changes
+* Choice of system boundary decides if an interaction is internal or external (no shit)
+* Nonconservative forces like friction or air resistance can dissipate mechanical energy as thermal energy or sound.
+
+## Mechanical Energy Components
+* Kinetic energy is energy of movement
+* Potential energy is energy due to position or config
+* Total ME stays the same when only conservative forces act inside the system
+
+By choosing the system carefully, you can set up systems where even if things in the system change no energy exits of enters, called Constant Energy Systems.
+
+When a system energy changes, that change matches the change across the system boundary. Energy entering increases total energy, energy leaving decreases it, and net change equals sum of in and out.
+
+## System Selection and Energy Changes
+
+|Comparison|Falling ball as system|Ball–Earth system|
+|---|---|---|
+|System contents|Ball only|Ball and Earth|
+|Gravity|External interaction; does work on the ball|Internal interaction|
+|Gravitational potential energy|Not included|Included|
+|Energy equation|ΔK=WgravityΔK=Wgravity​|Ki+Ug,i=Kf+Ug,fKi​+Ug,i​=Kf​+Ug,f​|
+|Mechanical energy conserved when air resistance is negligible?|No; the ball’s kinetic energy changes as energy transfers into the system|Yes; energy converts between kinetic and gravitational potential energy|
\ No newline at end of file