Can Jugglers Cross a Bridge with 5 Balls and a Weight Limit of 50kg?

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SUMMARY

The discussion centers on the physics of a juggler attempting to cross a bridge with a weight limit of 50kg while juggling five 2kg balls. The first juggler, weighing 45kg, cannot successfully cross the bridge while juggling, as the average force exerted during juggling exceeds the bridge's weight limit. The second juggler attempts to throw all five balls across the bridge and run to catch them. While theoretically possible, the success of this method depends on the juggler's speed and throwing strength, but the bridge's structural integrity remains a concern due to the total weight exceeding 50kg.

PREREQUISITES
  • Understanding of basic physics concepts such as force, weight, and momentum.
  • Familiarity with the principles of juggling and its impact on weight distribution.
  • Knowledge of Newton's laws of motion, particularly regarding force and acceleration.
  • Basic grasp of free body diagrams and their application in physics problems.
NEXT STEPS
  • Study the principles of momentum and impulse in physics.
  • Learn about the mechanics of juggling and its effects on weight distribution.
  • Research the structural engineering principles related to load-bearing limits of bridges.
  • Explore advanced physics problems involving forces and motion in dynamic systems.
USEFUL FOR

This discussion is beneficial for physics students, educators, and enthusiasts interested in the application of physics principles to real-world scenarios, particularly in dynamics and mechanics. It also serves as a thought experiment for those studying engineering and structural integrity.

  • #31
AdityaDev said:
The person exerts a force to throw the ball upwards and it came out to be more that 2kg.
Just to reiterate what I think is the definite argument in this case: The average force has to be larger than 50 kg-wt (55 kg-wt for 5 balls of 2 kg and one juggler of 45 kg to be precise), thus there must be points in time when the force is larger and the bridge breaks.
 
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