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Homework Help: Sorry I need so much help, my tutor is done for the semester!

  1. Jul 3, 2008 #1
    1. The problem statement, all variables and given/known data

    A spring is hung from the ceiling. A 0.483-kg block is then attached to the free end of the spring. When released from rest, the block drops 0.176 m before momentarily coming to rest. (a) What is the spring constant of the spring? (b) Find the angular frequency of the block's vibrations.

    2. Relevant equations

    (a) F = kx
    (b) omega = sq rt(k/m)

    3. The attempt at a solution

    (a) k = mg/x
    = (0.483 kg)(9.81 m/s) / 0.176 m
    = 26.8943 N/m

    (b) sq rt( 26.8943 N/m / 0.4383 kg) = 7.83329 rad/s
  2. jcsd
  3. Jul 3, 2008 #2
    well your logic looks right, i did the calculation for part a and got 26.92, not sure if that's where your mistake is...
  4. Jul 3, 2008 #3


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    Science Advisor
    Homework Helper

    Hi Kris1120! :smile:

    Nooo … :frown:

    The acceleration is not zero, is it?

    Use conservation of energy. :smile:
  5. Jul 3, 2008 #4
    oooohhhh yeaaaa.... i forget a lot after 2 months of no physics... acceleration is at a max when the block is momentarily not moving
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