1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Hookes law

  1. Nov 23, 2009 #1
    1. The problem statement, all variables and given/known data
    A mass of 2.3 kg is dropped from a height of 4.82 meters above a vertical spring anchored at its lower end to the floor. If the spring constant is 20 N/cm, how far, to the nearest tenth of a cm, is the spring compressed?
    answer is 34.1

    2. Relevant equations
    PE = mgh
    KE = (1/2)m(v^2)
    Hookes Law= (1/2)K(x^2)

    3. The attempt at a solution
    mgh = (1/2)K(x^2)
    Last edited: Nov 23, 2009
  2. jcsd
  3. Nov 23, 2009 #2


    User Avatar
    Gold Member

    There you go, that is how you solve the equation. The actual solution, however, is wrong. Did you keep your units?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook