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Homework Help: Hard Problem

  1. Nov 29, 2007 #1
    A block of mass m = 0.900 kg is fastened to an unstrained horizontal spring whose spring constant is k = 94.5 N/m. The block is given a displacement of +0.120 m, where the + sign indicates that the displacement is along the +x axis, and then released from rest.
    (a) What is the force (magnitude and direction) that the spring exerts on the block just before the block is released?

    (b) Find the angular frequency of the resulting oscillary motion.

    (c) What is the maximum speed of the block?

    (d) Determine the magnitude of the maximum acceleration of the block.
  2. jcsd
  3. Nov 29, 2007 #2
    What are the equations you're looking at using for this?
  4. Nov 29, 2007 #3
    x=Acos * angular frequency * time
    Vmax=A* angular frequency
  5. Nov 29, 2007 #4
    Here's one to start with, and should spring* to mind anytime you see a problem with a spring-- Hooke's Law:

    F = -kx

    relating the restoring force imparted by the spring on an object displaced from equilibrium.

    *sorry, I simply couldn't resist the pun :-)
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