1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Conical pendulum help

  1. Oct 7, 2008 #1
    It's not a problem, it's a proof. The trouble being that I'm not entirely sure what I'm supposed to be proving, which is why I'm getting so confused. Our instructor told us to verify F=ma using the equations that we got from a conical pendulum lab. When further prompted, he said to divide them (which I took to mean finding the tangent) There was also mention of showing the relationship between m (mass), l (length of the string the mass was on), R (the radius of the circle), and P (the period. (In retrospect, that seems to be the most important instruction.)



    Although I keep confusing myself, this is what I think I know:
    where T refers to the Tension force
    T_x =Tsin(theta T) =mv^2/R
    T_y= Tcos(theta T)=mg
    and from those I got tan(theta)=v^2/Rg=4pi^2R/Pg



    And that's where I get stuck, because I'm not entirely sure how to include l in the relationship, and if I do it should have to do with h (the height of the theoretical triangle), right? So if that's true, how do I take that into account and what should I be doing with the tan(theta)?

    Any help or guidance would be greatly appreciated-- I really just want to be able to wrap my head around this.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 8, 2008 #2

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    If you have a look at the circular motion equations you can probably substitute in for acceleration to get all the quantities you want. Just remember your trigonometry as that is where you will get the length of the string into the equation.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Conical pendulum help
  1. Conical Pendulum - help? (Replies: 12)

Loading...