How much do you need to increase the pendulums length by to

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SUMMARY

The discussion centers on determining the necessary increase in a pendulum's length to double its period. The relevant equation is T = 2π√(length/gravity), where T represents the period and gravity is a constant. The solution indicates that the new length must be 2√(l), where l is the original length. Participants emphasize starting with the ratio Tnew / Told = 2 to derive the solution accurately.

PREREQUISITES
  • Understanding of pendulum motion and period calculation
  • Familiarity with the equation T = 2π√(length/gravity)
  • Basic algebra skills for manipulating equations
  • Knowledge of gravitational acceleration (approximately 9.81 m/s²)
NEXT STEPS
  • Study the derivation of the pendulum period formula T = 2π√(length/gravity)
  • Explore the effects of varying gravitational acceleration on pendulum motion
  • Learn about the relationship between length and period in simple harmonic motion
  • Investigate real-world applications of pendulum mechanics in engineering
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone interested in the principles of pendulum motion and harmonic oscillators.

jstretto

Homework Statement


How much do you need to increase the pendulums length by to double the pendulums period

Homework Equations



T = 2PI sqrt(length/gravity)

The Attempt at a Solution



Answer is 2sqrt(l). But I don't know how to get there. Any help would be greatly appreciated, thanks.
 
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That answer does not even have the correct physical dimension. Also, please provide your own attempt as per forum rules.
 
You know the ratio Tnew / Told = 2. Start there.
 

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