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!

Determine the maximum tension in the pendulum rod

  1. Mar 19, 2012 #1
    1. The problem statement, all variables and given/known data

    A clock’s pendulum is 60 cm long with a bob at the end of mass 500 g. Determine the maximum tension in the pendulum rod when the bob is

    b) swinging at a speed of 2.4 m/s

    2. Relevant equations

    v^2 / r = ac

    3. The attempt at a solution

    9.8m/s^2 = g

    (2.4)^2 / 0.6 = 9.6m/s^2

    9.8 * 0.5 = 4.9N

    9.6 * 0.5 = 4.8N

    Fnet = 4.9 - 4.8 = 0.1 N

    What am I doing wrong? ._.

    Thank you.


    Okay guys I looked t it from another perspective and ended up wit the right answer.

    I added the force of gravity and the tension going up.

    But here's a small question. Why do we have to add them? Are they not cancelling each other out? Or is it because the pendulum is balanced ? o.o

    So we add both tensions?
     
    Last edited: Mar 19, 2012
  2. jcsd
  3. Mar 20, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    hi nesan! :smile:
    i'm very worried by your last question :redface:

    what did you think the two tensions were? :confused:

    (the acceleration is upward

    Ftotal = ma, so T - mg = ma, ie T = ma + mg)
     
  4. Mar 20, 2012 #3
    Yup, I got that last night while in bed thinking. Haha xD

    Thank you. :)<3
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Determine the maximum tension in the pendulum rod
  1. Tension in a pendulum (Replies: 5)

  2. Maximum Tension (Replies: 2)

  3. Maximum Tension (Replies: 7)

  4. Determine the tension (Replies: 5)

Loading...