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======Two Falling Coins - Projectile Motion======


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**Materials: **{{$demo.materials_description}}\\
**Difficulty: **{{$demo.difficulty_description}}\\
**Safety: **{{$demo.safety_description}}\\
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**Categories:** {{$demo.categories}}
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**Alternative titles:** Projectile Motion
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====Summary====                   
{{$demo.summary}}


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/* PROCEDURE - Optional                                                                                */
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====Procedure====  
  - Place a ruler so that it extends over the edge of a table.  
  - Position one coin on the ruler at the overhanging end and place a second coin directly next to it on the table edge.  
  - Flick the ruler so that the first coin drops straight down while the second is pushed off horizontally.  
  - Observe and listen for when the coins strike the floor.


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====Links==== 
Simple Projectile Motion Demonstration - Alom Shaha: 
{{youtube>NJ2_VVBlF3M?}}\\
Projectile motion demo with two coins - Simon Lloyd: 
{{youtube>5I0NLNthJGc?}}\\
📄 Two falling coins - Sciensation: [[https://sciensation.org/hands-on_experiments/e5060p_fallingCoins.html]]\\


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====Variations====
  * Try using different small objects instead of coins to confirm the result.  
  * Change the table height to see how the fall time varies while both still land together.  
  * Use slow-motion video to track the different paths of the two coins.


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====Safety Precautions====
  * Ensure the area below the table is clear to prevent coins from hitting people.  
  * Do not use heavy or sharp objects in place of coins.  
  * Be cautious when flicking the ruler to avoid hitting your hand.


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====Questions to Consider====
  * Which coin is faster, and why?  
  * Why do the two coins hit the floor at the same time?  
  * Does gravity affect vertical and horizontal motions differently?  
  * What does this experiment reveal about velocity as a vector quantity?


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/* Complete information in the Demonstration Info box below, following instructions exactly. */