Calculate Gravity with Ruzanna from the Netherlands

  • Context: High School 
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SUMMARY

The forum discussion revolves around Ruzanna's physics project, where she constructs a pendulum to calculate the acceleration due to gravity (g) in the Netherlands. Participants provide insights on conducting the experiment, emphasizing the importance of using a thin, strong thread instead of a rope, and the necessity of accurate measurements. Ruzanna successfully measures g using her pendulum, achieving results close to the accepted value of 9.81 m/s², while also discussing variations in g across different geographical locations.

PREREQUISITES
  • Understanding of pendulum mechanics and period calculation
  • Familiarity with basic physics concepts, specifically acceleration due to gravity
  • Knowledge of measurement techniques for time and length
  • Ability to analyze experimental data and calculate averages
NEXT STEPS
  • Research the effects of different pendulum lengths on the period
  • Explore how gravity varies at different latitudes and altitudes
  • Learn about the mathematical relationship between period and gravity (T = 2π√(L/g))
  • Investigate the impact of measurement errors on experimental results
USEFUL FOR

This discussion is beneficial for students in physics, educators teaching pendulum dynamics, and anyone interested in experimental methods for measuring gravitational acceleration.

  • #31
Reply to Sohiecentaur: Having a 1 sec period clock simplifies calculations. (most wall clocks are were designed with 1 sec period) The point mass is not important since pendulum length is not measured but calculated from the pendulum formula. I know the formula for gravity works, because I used it to set the clock to 10 second precision in a week after being repaired. I live In Mendoza, Argentina where latitude at my home is 31.919859 degrees South and at HASL = 821 m, then g is far from 9.806.m/sec2 (Actually it is 9.76462 m/sec2.. This g gave me a theoretical value for L = 247.34 mm which I never measured but allowed me to calculate how many turns to give to the adjustment nut once I have the delay/advance of the clock in 7 days. You can use other number of days, but for my clock it was the period for recharge the spring motors (is it the correct name?) It was really more fun than engineering task!
 

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