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: Transfer of spring energy

  1. Apr 22, 2009 #1
    A block of mass 0.250 kg is placed on top of a light vertical spring of constant k = 5200 N/m and is pushed downward so that the spring is compressed 0.093 m. After the block is released, it travels upward and then leaves the spring. To what maximum height above the point of release does it rise?

    my attempt:
    energy in spring = (.5)5200(.093)^2=22.4874J
    Weight of block = .250x9.8=2.45N

    What am i doing wrong?
  2. jcsd
  3. Apr 22, 2009 #2
    use the Energy formula involving initial and final energy.
  4. Apr 22, 2009 #3
    what is it?
  5. Apr 22, 2009 #4
    What makes you think you are doing these wrong? I got the same answer. Same thing with your centrifugal force problem. They both look good to me.
  6. Apr 23, 2009 #5
    it was wrong because it asks how high does the block go above the spring so i had do minus the length of compression of the spring from the final answer.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook