Surprising Rebound Speed: Physics Puzzle with Basketball and Baseball

  • Context: Undergrad 
  • Thread starter Thread starter tofani
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SUMMARY

The discussion centers on a physics puzzle involving the simultaneous drop of a basketball and a baseball, where the basketball rebounds and collides with the baseball. It is established that the basketball, being three to four times heavier than the baseball, will rebound with a surprising speed that causes the baseball to be propelled upwards. This phenomenon illustrates principles of momentum and energy transfer in elastic collisions. Participants are cautioned against performing this experiment indoors due to potential hazards.

PREREQUISITES
  • Understanding of basic physics concepts, particularly momentum and energy transfer.
  • Familiarity with elastic collisions and their properties.
  • Knowledge of the mass and weight differences between objects.
  • Basic grasp of gravitational effects on falling objects.
NEXT STEPS
  • Research the principles of momentum conservation in elastic collisions.
  • Explore the mathematical equations governing rebound speed calculations.
  • Investigate real-world applications of momentum transfer in sports physics.
  • Learn about experimental setups for demonstrating physics concepts safely.
USEFUL FOR

Physics students, educators, sports scientists, and anyone interested in the mechanics of collisions and rebound dynamics.

tofani
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This is the Puzzle

Hold a basketball in one hand, chest high. Hold a baseball in the other hand about two inches above the basketball. Drop them simultaneously onto a hard floor. The basketball will rebound and collide with the baseball above it. Estimate the rebound speed of the baseball? Assume that the basketball is three to four times heavier than the baseball.
The result will surprise you. Don't do this in the house!
 
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