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: Spring under gravity

  1. Mar 11, 2012 #1
    1. The problem statement, all variables and given/known data

    Consider particle of mass m on a spring of length k, suspended vertically( subject to gravity). Choose an appropriate coordinate for this 1 degree of freedom system and find the langragian. Derive the equation of motion and find the equilibrium point. Using a new coordinate u with u=0 at the equilibrium point, find the general solution to the differential equation. What is the period of motion?

    2. Relevant equations

    3. The attempt at a solution

    Sorry I just feel as if I am doing this wrong..... But can you please tell me if I am on the straight lines.... F=mg-kx and V=1/2kx^2. And T=1/2mx'^2 And the period is T=2∏/ω

    I don't really know what I can do....please help.
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted