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: Pendulum on the moon problem

  1. Jan 14, 2008 #1
    1. The problem statement, all variables and given/known data

    on the moon the acceleration of gravity = g/6 if a pendulum has a period T on earth what will its period be on the moon

    2. Relevant equations

    T = 2 pi sqrt(l/g)

    3. The attempt at a solution

    do you get...
    T / sqrt(6
    Last edited: Jan 14, 2008
  2. jcsd
  3. Jan 14, 2008 #2


    User Avatar
    Homework Helper

    How did you arrive at your answer? Though your answer is wrong, you have all that is needed in the answer(i.e. sqrt(6) and T are needed)
  4. Jan 14, 2008 #3
    ok well i did

    T= 2pi sqrt(L/(g/6))
    T=2pi sqrtl/g) * sqrt 6
    T/sqrt 6 = Period

    where Period = 2pi sqrt (l/g)
  5. Jan 14, 2008 #4


    User Avatar
    Homework Helper

    [tex]T=2\pi \sqrt {\frac{l}{g}}[/tex]

    and the period you want
    [tex]T'=2\pi \sqrt {\frac{l}{\frac{g}{6}}}[/tex]

    [tex]T'=2\pi \sqrt{\frac{l}{g}} *\sqrt{6}[/tex]

    so that


    Where T is the period on Earth
  6. Jan 14, 2008 #5
    oh ok I understand, and i Have another question on pendulums.

    A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at res the period of the pendulum is T. how does the period of the pendulum change when the elevator moves upward with a constant speed?
  7. Jan 14, 2008 #6
    If the elevator moves upward at a constant speed, what is the acceleration of the system? Are there any new forces acting on the pendulum?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook