1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Draw a pendulum

  1. Feb 12, 2006 #1
    Please Help!

    ok could someone plesae help me with this question

    I had to draw a pendulum and the questions asks what is the length of the pendulum if the period is .75 s so i got .142 m then it asks what is the speed of the pendulum at the bottom of its swing if the angle that makes its maximum displacement is 11 degrees? wow do i do that... I have no idea?????

    PLEASE HELP!!!!!!!!
  2. jcsd
  3. Feb 12, 2006 #2
    c'mon 11 views no help im sure someone out there knows it
  4. Feb 12, 2006 #3


    User Avatar
    Science Advisor
    Homework Helper

    HINT 1: What is the difference in height between the highest and lowest positions of the pendulum.

    HINT 2: Energy is conserved. :)
  5. Feb 12, 2006 #4
    difference is .142m - .03m i dont see how it helps
  6. Feb 12, 2006 #5
    is teh answer by any chance .16 or .23
  7. Feb 12, 2006 #6


    User Avatar
    Science Advisor
    Homework Helper

    What are the units of speed? And how did you get those numbers?
  8. Feb 12, 2006 #7
    .23 m/s

    (spi/.75)(.142sin11)= .23m/s
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook