Conservation of energy - pendulum

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SUMMARY

The discussion focuses on calculating the tension in a pendulum's rope, specifically when a person swings from a known height. Key factors include the length of the rope, the person's mass, and the gravitational force acting on them. It is established that tension is not constant throughout the swing; it reaches a maximum when the pendulum is at the lowest point of its arc. The analysis of forces at various angles from the rest position is crucial for understanding tension dynamics.

PREREQUISITES
  • Understanding of basic physics concepts, particularly forces and motion.
  • Familiarity with pendulum mechanics and energy conservation principles.
  • Knowledge of gravitational force calculations.
  • Ability to analyze forces at angles using trigonometry.
NEXT STEPS
  • Study the equations of motion for pendulums, including angular displacement and velocity.
  • Learn about energy conservation in mechanical systems, focusing on potential and kinetic energy transformations.
  • Explore the concept of centripetal force and its relation to tension in pendulum systems.
  • Investigate the effects of varying mass and rope length on pendulum dynamics.
USEFUL FOR

Physics students, educators, and anyone interested in understanding the mechanics of pendulums and the principles of tension and energy conservation in swinging systems.

Treefrog123
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If I have a person swinging on a rope (like a pendulum) and I know the height above the reference level that the person starts swining from, as well as the length of the rope and the person's mass and weight... how can I find tension in the rope? Is tension constant throughout the entire swing? My first thought was that the tension is not constant, and is at a maximum when the rope is hanging straight down, but how do I know if this is true?


Thanks
 
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Try looking at the forces at some angle displaced from its rest position.
 

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