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: A question on springs energy

  1. Feb 4, 2007 #1
    i added a picture of the problem!

    when the body is at point A the spring
    is in relaxed status.
    it lengths in relaxed statues is 0.6m

    then a power P =20N is pulling the body to point B AB=0.25m
    i was asked what is his speed when it reaches point B

    so i made an equation that the total work equals the energy in the end
    minus 0 (because there were no energy at the start)
    i got that the speed of the body is square root of 15

    the power P stops working a point B permemantly.
    now i am being asked

    what is the minimal distance that that body will get to the wall?

    i tried to do the equation the bodies kinetic enrgy equals to its spring potential energy
    it doesnt work i get that the amplitude is longer than 0.6m (not possible)
    plz help

    Attached Files:

  2. jcsd
  3. Feb 10, 2007 #2

    Tom Mattson

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    My calculation agrees.

    Can we see your steps please?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook