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: Textbook with spring sliding, use work-energy thm to solve

  1. Feb 20, 2009 #1
    A 2.20kg textbook is forced against a horizontal spring of negligible mass and force constant 220 N/m, compressing the spring a distance of 0.270 m. When released, the textbook slides on a horizontal tabletop with coefficient of kinetic friction 0.30. Use the work-energy theorem to find how far the textbook moves from its initial position before coming to rest.


    The answer is 1.2m. Can someone help me solve?

    Thanks.


    My attempt was:


    change in KE + change in Elastic potential energy = -friction x distance
    0 + (-0.5k(x^2)) = - 0.30(mg)(L)
    L = 2.48m
     
    Last edited: Feb 20, 2009
  2. jcsd
  3. Feb 20, 2009 #2
    Oh. I had a careless mistake!!! Ahh. Okay i know le. Haha Thanks.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook