How to control velocity in a conical pendulum

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SUMMARY

The discussion focuses on controlling velocity in a conical pendulum experiment, specifically using the formula v = 2πr/T. The user seeks to understand how to manipulate both radius (r) and period (T) when varying mass. Key insights include that velocity cannot be directly controlled but calculated, and that radius can be determined through trigonometric methods while period can be measured with a stopwatch. The conversation clarifies the relationship between mass, radius, and period in the context of horizontal circular motion.

PREREQUISITES
  • Understanding of conical pendulum dynamics
  • Familiarity with the formula v = 2πr/T
  • Basic trigonometry for calculating radius
  • Ability to measure time accurately with a stopwatch
NEXT STEPS
  • Research methods for measuring period (T) accurately in pendulum experiments
  • Explore trigonometric techniques for calculating radius (r) in circular motion
  • Investigate the effects of mass on pendulum dynamics
  • Learn about alternative velocity measurement tools or apps for experiments
USEFUL FOR

Students conducting experiments in physics, particularly those focusing on circular motion, as well as educators seeking to explain the principles of conical pendulums and velocity control.

May
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Homework Statement


I'm doing an EPI on horizontal circular motion and for one test the independent variable is mass and I need to control the velocity by using the 2πr/T formula. So I know how to use the forumula to find an unknown but how do I use it for two unknowns (r and T). Is there a forumula with M in it that would help?. Because the r will be different for the different masses and so will the T. I'm really confusing myself now, but I guess my question is how do I control velocity in the experiment.

IV: mass, length of string
CV: velocity ...
DV: angle

P.S I'll be spinning it by hand and don't have access to a velocity measuring device (unless its an app or something)

Am I missing the point completely?

Thanks for any help you can give
 
Physics news on Phys.org
You use ##v=2\pi r/T## to find the velocity, not control it.
You can find r using some trigonometry and you measure T with a stopwatch.
 

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