======Egg Spinning Inertia======


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**Alternative titles:** Raw vs. Hard-Boiled Egg Spin
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====Summary====                   
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====Procedure====  
  - Prepare one hard-boiled egg (cooled to room temperature) and one raw egg.  
  - Show both eggs to the class, explaining that one is raw and one is cooked.  
  - Spin both eggs on a table, then briefly touch each one to stop it. The raw egg will start spinning again slightly after being released, while the cooked egg will stop completely.  
  - Ask students to explain the difference using Newton’s First Law of Motion.



====Links==== 
Spinning Eggs | Inertia Demo | Science Experiment - Elearnin: 
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Egg Experiment to Demonstrate Inertia - Veritasium: 
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📄 Egg Spinning - Science World: [[https://www.scienceworld.ca/resource/egg-spinning/]]\\



====Variations====
  * Try spinning a soft-boiled egg to see how its motion compares.  
  * Use plastic eggs filled with different materials (sand, rice, water) to mimic different internal states.  
  * Relate the demo to human balance—how spinning affects the liquid in our inner ears.



====Safety Precautions====
  * Handle raw eggs carefully to avoid spills.  
  * Wash hands after handling raw eggs to prevent salmonella risk.  
  * Perform on a smooth, flat surface to avoid breaking the eggs.




====Questions to Consider====
  * How can you tell which egg is raw and which is hard-boiled? (The raw egg wobbles, the hard-boiled egg spins smoothly.)  
  * What happens inside the raw egg when it spins? (The liquid inside shifts, changing its center of gravity.)  
  * Why does the raw egg keep spinning after being stopped? (The liquid inside maintains motion due to inertia.)  
  * Why does the cooked egg stop completely when touched? (Its solid interior moves with the shell, so friction stops it immediately.)  
  * How does this demonstrate Newton’s First Law of Motion? (Objects in motion stay in motion unless acted upon by an outside force; the liquid inside the raw egg resists stopping.)