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1R40.30 - Balls Wanted Dead or Alive

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​1R40.30 - Balls Wanted Dead or Alive

Preview
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Title1R40.30 - Balls Wanted Dead or Alive
Objective

Demonstrate elastic and inelastic collisions.​

StatusAvailable
Assembly Instructions

Provide both balls and a container. Two different sizes are available, 1 1/4" in diameter (Lecture Hall use) and 3/4" in diameter (export).

Setup Time5
Operation Time5
Preview Time5
Operation Instructions

Two balls which have the same size, color, and density are dropped from the same height onto a hard surface (pick an arbitrary but repeatable height). One bounces to almost the same height while the other doesn't bounce.​

ExportableYes
Demo on DimeNo
PIRA 200Yes
Export Instructions (if different)
HazardsNone
Analysis/Information

The balls have very similar aesthetic properties: size, color, and density. They have one important difference: elasticity.

In an elastic collision, the kinetic energy is not converted into heat. In an inelastic collision, the kinetic energy is converted into heat.

What it looks like If heat is created: the ball doesn't bounce back off a hard surface. If little heat is created: the ball bounces back with almost equal height.

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Category1 Mechanics
Subcategory1R - Properties of Matter
Keywordshappy unhappy balls, happy sad balls, bounce no bounce balls, dead and live balls, bounce-no-bounce balls, happy-sad balls, happy-unhappy balls, dead-live balls
Construction Information
 
Equipment TitleUse SHIFT+ENTER to open the menu (new window).
  
QuantityUse SHIFT+ENTER to open the menu (new window).
  
dead/alive ball sets
1