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!

Why is this wrong, Spring Problem

  1. Feb 21, 2006 #1
    A 2.00 kg block is attached to a spring of force constant 590 N/m as in Figure 7.10. The block is pulled 6.00 cm to the right of equilibrium and released from rest.

    (a) Find the speed of the block as it passes through equilibrium if the horizontal surface is frictionless.

    We can use potential energy here...MGH=1/2MV^2
    V=1.0844 m/s

    Why is this off?
  2. jcsd
  3. Feb 21, 2006 #2
    because it isn't gravitational potential energy... it's elastic potential energy.
  4. Feb 21, 2006 #3
    The elastic potential energy is [tex]E=\frac{1}{2}k\Delta l^2[/tex]
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook