Why Doesn't a Pendulum Hit My Face When Released?

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SUMMARY

The discussion centers on the mechanics of a pendulum and why it does not return to hit the face when released from eye level. The key concepts include the conversion of potential energy (PE = mgh) to kinetic energy (KE = 1/2mv²) and the impact of energy loss due to air resistance and friction. The conclusion drawn is that the kinetic energy diminishes with each swing, preventing the pendulum from returning to its original height and trajectory.

PREREQUISITES
  • Understanding of potential energy and kinetic energy concepts
  • Familiarity with the equations PE = mgh and KE = 1/2mv²
  • Basic knowledge of energy transfer and conservation laws
  • Awareness of friction and air resistance effects on moving objects
NEXT STEPS
  • Research the principles of energy conservation in mechanical systems
  • Explore the effects of air resistance on pendulum motion
  • Study the role of friction in energy loss during oscillatory motion
  • Learn about the mathematical modeling of pendulum dynamics
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Students studying physics, educators teaching mechanics, and anyone interested in understanding the dynamics of pendulum motion and energy transfer.

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Homework Statement


When I release a large pendulum from about my eye level, why does it not return and hit my face?


Homework Equations


PE=mgh and KE= 1/2mv^2 possibly?


The Attempt at a Solution


I was thinking that it had something to do with a transfer of potential energy to kinetic energy, with the kinetic energy getting smaller in each swing.
 
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Based on what I was taught in my physics class, my guess is your teacher is looking for an answer somewhat along the lines of: "Because Kinetic Energy is transferred via friction to the air the pendulum is moving through therefore on its return swing it does not have as much Energy as it had when released."

However I'm not sure that's what you are discussing in your class.
 

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